Which one is right?

I personally don't like question peoples' belief but this readings on Native religions that I have been doing really bother me. What disturbs me is that people used the excuse of civiliziting the Natives as an excuse to kill them, steal most of their land, and say that God placed this destiny for them to do this. I'm not Christian but I can be sure that God doesn't support killing people to get what you want. And honestly when we get down to it, who really can say that there religion is the "right one." We were not there 35 hundred thousand years ago meeting the mesiah in person or in the life span of Buddha. Faith is all about believing in things that aren't normal and that can't physical touch. In my case, I switched between three religions as a way of soul searching to see which one really hit me as loving to all creatures and races. I just can't believe that so many people bought into that "Manifest Destiny" crap.