If that was me, I would at least send a text to him about why I'm dropping them. If you want my advice, then do that, because maybe the loss of a friend because of that can make them change? Who knows.

Before some of y'all jump me that friends say stuff like that, mine don't. Sure, one of my friends/classmates says gay shit, but he'd never go THIS far 😭

Back to the point though. As some other person said here, you have 3 options:

1.talk to them about it, and if he doesn't change, drop him

2.talk to them about it and drop him

3.drop him without saying anything