Masculinity

Can we be like... trans-positive without blatantly hating on cis-people? Like... that's the exact kind of humour you don't want about the trans community... why spread it yourself then?

It very specifically targeted cis men with fragile masculinity, not cis men generally.
Trans people also make jokes about being trans all the time, the difference is they're actually funny and the punchline isn't that someone is trans. The punchline here isn't that the dude is cis.
Edit: Jesus, I didn't even notice this was in the transmemes community. How fragile can you be??
- Yet, being cis is part of the joke, right? You could have just as easily included trans men with overly masculine behaviour into this without changing the punchline So why are the men laughed at cis in particular? What you say is akin to "Yeah, but the joke isn't racist, I didn't joke about all the blacks! Just about the insecure blacks! That's not racist!"
- Be Italian instead, we're offended if you don't say terrible things about us and lean into stereotypes.
  Obligatory gabbagool
I'm a cis man, I didn't feel targeted at all by this. It's pretty explicit about who is the butt of the joke.
This isn't hating on cis people at all? It's very specific about what type of person it's making fun of. So like I'm cis but vaguely effeminate and didn't feel like this was making fun of me in any way shape or firm, because I don't have issues with fragile masculinity.
I agree, I don't really think it's fair to hate on someone for their gender identity. I think we should hate on people and groups for their actions and how they choose to be as people. People acting like Bigots and assholes is a choice they made, being any gender identity, isn't a choice.
That being said this doesn't really seem to be targeting cis people specifically, rather it seems to be targeting the people who strongly believe in gender stereotypes and force them on others, sometimes even going as far as to suggest that compliance with them can make or break your gender. These people should be made fun of and criticized for that behavior and for those opinions because it is toxic and harmful towards others.
This isn't hating on cis people, it's calling out those who uphold stupid sexist social norms that actively contribute to our marginalization. The pressure on men to avoid any and all things seen as feminine is very real and very stupid, and it made me miss out on so many great things for many years of my life. I'm still trying to undo the damage it has done to my mind. So excuse me for taking enjoyment from mocking something that has hurt me so much.
You can be cis without being the cis man in the meme. The people who are that man can change.
Why laugh?
At first glance I read trans men & cis men and was like wtf. Then I made sure to read it properly because it couldn't be this bad. It isn't, but I don't like it either.
Additionally this meme could have blamed or made fun of social norms, instead of individuals (who are victims in that regard), but I digress.

The most manliest thing you can do is whatever the fuck you want.

(It's cool when women do this too but this is my response if someone gives me shit for drinking fruity drinks or w/e. That and it tastes nice and gets me fuuuucked up)

The most [INSERT HUMAN SUBCATEGORY] thing you can do is whatever the fuck you want.
Fixed it for you

It's funny that they want to act like they are masculine and in control, but they don't realize they are giving all control to others when they act like this.

“I’m a man because I say so”

the manliest shit I’ve ever heard

Also cis men with fragile masculinity: Why do the cis men we bullied in school for stupid bullshit like wearing pink or not being performatively heterosexual, not like us bullying trans people?

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