"My cousin recently set me up on a date with a really great guy that she knew from work. At first, I was hesitant to go on a date with him as he is 43 and I am 27, however I decided to give him a chance and I was really glad I did. He’s smart, funny, and easy to hang out with. I am also very attracted to him physically.
The only bad thing, so far, is that during a text conversation, he alluded to believing that 9/11 was an inside job. At first I thought he was joking, but further questions revealed that he was not. We discussed it in person the next time we met up, and he was joking about it with me but didn’t change his stance. Is this a deal breaker? I felt bad afterward because I was basically making fun of him to his face not realizing he actually believed what he was saying."
https://slate.com/life/2017/12/dear-prudence-im-dating-a-9-11-truther.html