How do we know for sure!?

All I am saying is that, how do we know for sure that Hitler can be trusted? What great things has he and can he do for us? Sure, he may have the strong, and confident voice that people want, but I still get the great feeling in my stomach that says that trusting Hitler may not be the best idea. I mean what does he want from all of us anyway, what does he really want to be our ruler for!?