Also, what do you mean by hostile?

Treating someone like an enemy. Shrug. I don't have a clear bright line or anything, the amount and intensity of bigotry someone must exhibit before I'm comfortable calling them a bigoted person is pretty high.

If I believe it's better for people not to have behavioral disorders or/and addictive disorders develop a treatment and encourage people with said disorders to take it am I being hostile? What if I do the same w.r.t. homosexuality?

In both cases it depends on why you want people to take the treatment.

We're now very far from what was a pretty contingent defense of another commenter's position and I don't especially enjoy the topic...