The Indians were scalping each other before the Europeans arrived.
They have dug up mass burial grounds from hundreds of years before Europeans were here.
The victims were scalped.
but, you are introducing actual facts into a narrative. The narrative pushed by the liberals, is that the Indian peoples were living in peace and harmony with nature, until evil Europeans massacred them.
If there are discrepancies between facts of a situation, and the liberal narrative, then the liberal narrative overrides any inconvenient truths. (sarcasm)