Good point

Wait, are these THE friggen frogs?

Excuse me but one of them is clearly Toad.
Look how smart they have gotten since turned gay!!

It's not about gay marriage, it's about control. If these people magically got everything they wished for banned today, they would just think up more stuff to ban tomorrow. Eventually they would be punishing people for getting the wrong haircut ... just look at the Middle East, that is what "conservatives" thirst for.

Bullshit! Next you'll be telling me I can refuse to suck cock when I'm asked. Oh, how I despise those tasty and juicy gay cocks!!! I just hate the throbbing manliness, all thrusty and powerful.

Anyways, I'm off to my mate Hunky Sean's for a doodah, to do a youknow, to do the for stuff and things.

But what if I secretly like him and my dad called me a girl when I was growing up? Surely THEN I'm entitled to a platform, anger, and violence!
^{Tiny /s in case it's needed}

Conservatives> And I took that personally

I will be honest with you, in the USA "back in the day" it was a lot more than just conservatives who were opposed. And, it was an order of magnitude more people who would have been completely okay with things if it had never become legally recognized.
It was very common to hear people who were otherwise completely okay with gay people and who treated LGBT+ folks well say things like "why do they need to get married" or "I think they should be able to get civil unions but marriage is between a man and a woman" or all manners of other arguments for why. And let's not forget that the current situation with legally recognized same-sex marriage was not due to the will of the majority of the voting public. It was via the courts.
While I appreciate the allies and all the people who aren't / weren't out there actively opposing gay marriage in the USA, and I completely acknowledge that lots of people have probably changed their stance on the issue in the ensuing decade+, I'm not going to fool myself into believing it was only conservatives who needed to hear the message in this meme.

This shouldn't even be political.

I'm straighth-ish but also very single so if a gay person proposed to me I might not say no

Hey, so you wanna marry Mr Toad?

lmao, the idea of:

Nay! For I hath far too many gay suitors! The proposals are simply too much for I!

"I hath been overwhelmed by flowers and proposals! Won't someone free me of the endless jewellery?"

Ok, but I could oppose gay marriage & still want to say "yes" to a proposal for such.
\ Bigotry is about denying others, not yourself.

/s
\ (Well, not sarcasm, whatever this is)

This is not the reason why conservatives oppose gay marriage. Here are the reasons I can understand (though not necessarily agree with):

having 1x mom and 1x dad is important because men and women provide different functions when raising a child, and children deserve to get both of these things.
"marriage" is a religious thing, not a legal thing; maybe gay-"legally married" is fine, but religious congregations shouldn't be forced to perform gay marriages as they go against their religion.
the normalization of homosexuality will spread and convert more people to homosexuals/bisexuals and/or encourage people to come out of the closet. (I'm not exactly sure why this is a problem tbh.)

Are there other reasons that they have?

First of all. Thank you so much for refusing to fight against strawman arguments and putting forward what people actually believe. It's much more productive, and interesting to talk about. I hate religion and I hate their stupid arguments, but I wish that criticisms would focus on the stupid arguments they actually make, instead of stupid arguments they don't make.
On the marriage front, and I know it's not your beliefs I'm rebutting here, that argument has always especially bothered me. Because it's like. Yes, actually, I do think gay marriage is nonsensical. Marriage is indeed a religious concept, and all of the religions that promote it condemn homosexuality. I hate marriage in general and wish nobody would get married. Yet it still happens, why? Why do gay people even care about being married then?
Primarily, it's because the Christians forced their religious construct to become so intertwined with legal and financial benefits that are otherwise unobtainable, that you put yourself at an objective disadvantage as a couple, economically, medically, legally, if you do not get married. The problem is that once marriage passed from the religious conceptual realm where it gestated, and into the political sphere, it should have become a separate, secular concept under the idea of separation of church and state. But of course the Christians can't accept that kind of compromise either. They want to have it all, all, all. So if Christians didn't want gay people to want to get married, then they shouldn't have enshrined their religious concept unfairly above others in the governmental system. Whoever sows sparingly will also reap sparingly, motherfuckers.
- This presupposes that marriage is a strictly religious tradition - which is false. Marriage as a concept exists across many cultures sometimes as a religious tradition and sometimes as a civil one or as a swearing of personal oaths.
  It is also not strictly a thing that all religions abhor same sex unions or do not have traditional same sex marriage as a thing. There are a number of Indigenous religions across the world which have gay marriage as a feature, new religions can factor them in as valid or existing religious sects can change. Bans on gay marriage force the state to adopt the traditional Christian stance on marriage at the exclusion of other religions and cultural traditions... While also denying a number of functions at a civil level such as spousal benefits, rights regarding legal decisions, visitation rights in hospitals and so on.
- I don't agree that marriage is strictly a religious thing. It's for the same reason I also don't think that Christmas is a strictly religious thing. I'm not religious, and even if I were, my parents' religion is not christianity. Despite this, I celebrate a secular Christmas. Gifts are given, mirth is enjoyed, and various other traditions observed. Perhaps some day I'll be secularly gay-married.
  Christians rarely complain about non-christians celebrating christmas but wrong, but some christians are quite vocal about gay marriage being an affront to god or whatever. I wonder if it's because Christians understand that there's "christmas" (the capitalist funtimes holiday) and then there's Christmas (the religious holy day). Maybe this understanding can be extended to marriage as well.
  Either way, as someone who doesn't really understand religion and is happy to let other people do their own thing, it doesn't bother me if there are churches that refuse to perform same-sex marriages. I can understand that perhaps a baker shouldn't be allowed to reject a making gay wedding cake on homophobic grounds, but I think it's a tougher sell for me that religious congregations should be forced to do same-sex marriages. But again, I don't care strongly either way.
Yeah I honestly don't get this. It's like saying kids should be raised by one scientist and one artist because the kid deserves both influences. Even within the nature of "women" and "men" the diversity of experience and personality is so massive is seems to defy logic that this could possibly create some unified, prescriptive parenting framework, unless you are desperate to pigeonhole individuals into gender roles which simply don't exist in reality.

Really? That easy? lol Can't be. Thought we had to take any proposal fired our way

Will you marry me?
- Let's see if I can do this...
  Umm... well... umm... ... ...
  This is a lot harder than I thought it would be