Truth is not relative

A man came into Skypeland and started to complain about political correctness and relativism. He said however, he could determine which religion or belief was correct and true. He was completely disdainful of the notion that one should be tolerant of other beliefs. He also felt very persecuted as a white male in the US. I was asking him how he knew his variety of Christianity was correct and the truth, and the room was beset by a horde of people making catcalls, and playing music and disrupting the cast. And everyone left, and I never got to find out the answer. Maybe I will get him to tell me another time...