Well to blame it on Evangelical Christians need to be given more thought. You see the earliest known original occupants of the land were called the Canaanites, some Polynesians, the Israelites and this was thousands of years ago.

The Philistines may actually be the ancestors of the Palestines all of which you are most likely ancestors of the Canaanites.
And there have been wars going on between these tribes for thousands of years. What we term Christianity did not exist no I did evangelicals.

But you are correct when referring to the American Indians and how those who consider themselves Christians massacred them but let's not forget Africa and Australia.