Babur is a decent guy to his own people and a great leader (not overly cruel either; he genuinely does what he thinks is right) it's just that Tin's culture is kind of like poison. Not to mention that being an Ajdar fanatic also makes him slightly less...reasonable and friendly.

If any nation tries to commit genocide it's probably going to be Tin, but I'm not sure how Babur would feel about it. He's more merciful than most of the Temple and military officers. He might intercede, like he did when Baktu wanted to have him kill his other brothers.