No one can say that you can't have a opinion on these type of things. HOWEVER, saying it out loud where alot of these people support and some are LGBTQ+ is rude and annoying.

Everyone has their own different opinions, Most support it and if they can't support it due to their religion then they [depends on what religion] at least respect it. So yes your allowed your opinion, and people do tend to tell others off for their own opinion.

I respect the fact you obviously don't seem to like the lgbtq+ community but I don't think you have to go around on post pointing it out, That just makes more people annoyed at you.