The future, largely, really, belongs to those who can build and service the "machines". That means those who can code. Incidentally, every coding and scripting language developed was developed by some one of Euro descent with the exception of PHP (Jewish guy, I believe) and Ruby (Japanese guy). That's not be being racist, not wishful thinking--it's just a cold, hard fact.
The number one thing you can do is make sure your kid can code and think in code.
I wanted to grab that a..hole by his neck and ask him how exactly were the minorities going to get revenge by destroying the people who responsible for them living better than most of the world's people of whatever color.
If whites are reduced to a small minority, I don't see a South Africa scenario. I see American whites establishing their own country and blacks and browns left to fend for themselves. The slaughter between blacks and Hispanics would rival the ethnic slaughters of India and Africa.