America isn’t even 250 years old. That’s, what, five generations? Do remember that most American “settlement” of these areas was specifically designed to drive out the real locals, whose basic planning took on a seven-generation timescale.

With a lot of problems of this nature, especially social issues, the key is to “zoom out” to get a clearer, more sane picture of what’s going on. Humans were made to migrate, and these “locals” can adjust.