They walk among us!

I had a good friend come to this conclusion recently that the world is flat. He is an Alfa Male type guy ...blacl belt in mixed martial arts , gym rat, fun guy to hang out with. The other day he shows up at my work preaching this earth is flat stuff and I started to laugh. He burst into tears saying that Revelations in the Bible has already happened in 70AD. We can all still be save. Trump getting elected and Rockafeller passing away are all signs. They are lying to us spreading the lie that the earth is round. All I could think was this guy has lots of guns lol. I didn't know what to say. I considered him a friend but not sure what to do about it now. I felt like maybe he was on some crazy drugs or maybe hasn't slept in weeks.