The native indian tribes had their own culture of warring against each other for territories. They took land from each other...killing, etc. along the way.
But, they are viewed as peaceable victims...innocent of any such behavior until the big bad 'invaders' came to grab their land and kill them.
FAct is fact, history is history. Corruption and twisting of facts and history is criminal.
'They took land from each other' -- and all etcetera. Don't forget the skinning victims alive stuff and all the really barbarian things they did.
When I visited my great-grandmother's hometown in Kansas, there was a display in the museum of graphic pictures of what the Indians had done to the settlers, with a sign explaining it all in great detail, "SO THAT WE SHOULD NEVER FORGET." I loved that museum.