One thing I don't understand is why do some people think that some people just want humanity to end?

I feel almost ashamed saying that I have a homophobic family member who told me that the west is suddenly open and accepting towards LGBT in the recent years because they want humanity to end 🤔 I tried talking some sense into him and saying that it's simply the way of thinking evolves according to the current times (like on general throughout history) and that his argument is just invalid and stupid but that changed nothing..

In moments like those I just feel defeated tbh.. but it's all really just sad how people justify hate with dumb theories.