I don't like putting the blame on a "takeover". Democracy is about a kind of equality among people, and the US has had a strong anti-democratic strain since slavery. Probably even feudalism before that. Once you see it, you see it everywhere and can't unsee it. There's a reason Trump's best polling issue is immigration. https://www.natesilver.net/p/trump-approval-ratings-nate-sil...

There was always going to be a day of reckoning. If you want multiculturalism, you need to follow Europe's lead with everything from strictly banning Nazis (Germany), to healthcare, to getting over 90% mutlilingualism (Nordic countries).