Pre-Columbian First Nations lived by the millions in North America for thousands of years without anything like the ecocides done by white settlers in less than 10% of that much time.

If you don't believe that large numbers of indigenous people were killed by white settlers, this means that you are immune to historical reality. 

Good job blaming the victims of the pandemics though. You probably also think that bison, passenger pigeons, dodos, and great auks had it coming too.