anyone else lowkey feel like lots of people act accepting of you when really they aren't okay you being gay?

(am grade 12 highschooler for context) recently found out that one of my very good friends is actually quite against gay marriage and gay people in general, despite saying the opposite when around me. obviously i don't plan on talking to this friend much more from now but it got me thinking a lot about quite a few religious people i know who act accepting and kinda makes me a tad concerned for after i graduate school, since i genuinely like a lot of these people and would be pretty upset if they hated something about me that i couldn't change.