If you are against gay marriage there’s nothing at all toxic or hateful about that. Hell, I know gay people who were against gay marriage when the public debate was at its peak.
Where it’s toxic is if any time a gay person talks about wedding planning, posts a meme about the phrase “her wife” having good energy, or shares art of two guys at the altar you appear in the replies to get on your soapbox and start an argument about gay marriage. Nobody asked. Alternatively, just like HN, if your account is entirely flamebait about gay marriage nobody wants to see that and you’ll get the hammer.
Where it’s hate is when you express the that you’re against gay marriage because you don’t want to see gay people to be out in public, you think affection between two men is disgusting and unnatural, you call their sexual orientation a lifestyle choice, call gay people pedos, or otherwise pick on, doxx, belittle, or dehumanize gay people.
Like y’all, it isn’t that hard to expressly minority opinions without being toxic or hateful. I express minority opinions constantly and have never once even been worried about the banhammer.