Killing indigenous people through state-sponsored terrorism and war, along with the systemic psychological violence of the reservation system as a means of political oppression and cultural suppression, was indispensable to making America a great industrial civilization.  So, when so many Americans today (and yesterday) are prone to glorifying this country as fundamentally a Christian nation -- whose "greatness" they are eager to attribute mainly to their religious "values" --  but are now terrified by the influx of immigrants who might do them harm, they should remember that violence, terror, and immigration (by Christians) are what made America "great."