I’d actually say that IS homophobic…even passive homophobia like purposefully avoiding LGBT things or making snide remarks is homophobic. I don’t have enough information on whether it’s SAFE to come out, I think that’s up to you to determine, but beware that they sound homophobic, so I think it might be best to wait until you’re an adult, financially independent or have a back up plan (like someone to stay with if the environment became unsafe). I think it might be worthwhile figuring out more about their views first though? Like maybe bring up a television show or a friend who is LGBT and see how they react…that might give you a far better indication. Then once you have that, you can reassess the situation.