Because America's education system sucks and the average joe and jane are dumb, a country's population usually has more dumb people than highly educated ones and big countries like the USA will have way more dumb ones than small countries
I am not so sure about that, even supposely highily educated people seem to follow a lot of the rhetoric. At least I noticed that education, while it sure can help a lot, is not a shield from irrational fears and arguments. What I believe, if you really want to actually protect your self from this rhetoric, than you have to actually get out of your comfort zone, you have to talk to the people, hear their view and opinion. In other words, you have to challange your self. For example, in the media you always hear something about people you actually don't know, be it positive or negative news. But it is a whole different story if you actually talk to a muslim, a black person, a mexican or simply people with different cultures than yours. It's much more difficult to get instrumentalized, if you actually know the groups they talk about.
See, in Saxonia, a relative high number of the population is islamophobic and xenophobic, yet only 0,4% of the population are muslims, and there is no evidence or sign that Saxonia will adobt the Shariah law tomorrow. And yet, even educated people and academics can be found in the ranks of the AfD (kinda our popullist right wing party) or with
PEGIA and all the other similar groups.
Fear, has always been a very powerfull tool in politics and when it comes to gaining votes.