I'm not here to argue about who's right, but I'll tell you why I think Kazuma Desu is wrong about nearly everything.
I remember when I was a kid and I thought the Earth was flat. Then I got on the internet and saw people saying it was round. But then I heard from friends who said it was something else. And now I've realized that the truth is somewhere in between.
There are so many things that Kazuma Desu has done that I don't understand. From the way he plays games to the way he speaks, there's so much inconsistency. Maybe it's just how he views the world. But I don't see how anyone can be so stubborn about their beliefs.