I’d go a step further and say “most of it is true, some of it isn’t” but in any case, a lot of it is irrelevant. I’ve known many of these things for ages, but they don’t always matter. Yes, a lot of people are ignorant, and there are a lot of false assumptions out there, but that does not mean I should kill anyone. eg the fact that Jesus was born on 21st June and not 25th December does not really take away the fundamental message of Christianity, which is “love thy neighbour”. And even if he were born on the 25th of December, it wouldn’t make the Crusades any less evil.