The question is worded in terms of morality, not acceptability within society. I might find non-veganism immoral, but I rarely mention this fact to others, and while I have lived a vegan lifestyle for almost 7 years now, I make no suggestion to others on the subject unless prompted directlt in conversation. If many Republicans feel that same-sex relationships are immoral, this may primarily impact their attitudes towards their own lives and not how they see those of others.
Furthermore, less than 50% support doesn't mean over 50% direct rejection. Plenty of individuals don't know what to think and will let anything happen as they drift through their lives. Thus, this statistic alone isn't enough to conclude that most Republicans are against same-sex relationships.
I think this is actually pretty clear and useful information on Republican support for same-sex relationships - what-abouting between 'moral' and 'acceptable' isn't useful here, particularly when you take this research in the (very important) context of recent lawmaking around rainbow communities.
My point is mainly that it does not mean that over 50% of Republicans want to put gay people behind bars, which can easily be concluded from something like this. I think it represents a general attitude but isn't a concerning statistic on its own.
Your comment on the context of current legislation is a good way of conceptualizing the data, but nonetheless I don't think that 43% acceptance is bad. Adding in probably 90%+ of acceptance from Democrats, the average is still well over 50% in most areas, so saying that a characteristically anti-LGBT group is anti-LGBT is not too concerning.
Either way, it's obviously important to be aware of political trends, and I don't want to discourage a high level of awareness. The swift erosion of rights in the US is cincerning enough for me to start learning German with a general idea of moving to Switzerland.
I don't think anyone made the argument they want to out someone behind bars because of this post.
It's dishonest to say that they wouldn't, perhaps, support ending marriage equality and rights. Is that not bothersome? It's really upsetting to see you downplay and side speak a very serious issue.
Dehumanizing leads to being alright with doing any number of things to someone. Theae numbers reflect them stepping towards that.