Not even close to fringe. From 2008 to 2014, white nationalist organizations increased from 149 to over 1,000 in 2014. It began with the election of an African American and has snowballed ever since. Trump's calling card is immigration and his ability to marginalize minorities and women. Trump's supporters are absolutely bomb-first-ask-questions-later. 41% of Trump's supporters are for the bombing of Agrabah, the fictitious city of Aladdin. The list goes on and on.
If you want to see some eye-opening footage, find rally footage from Palin's speeches in places in the Midwest like Ohio. I was blown away out the open racism. The economy is doing pretty well for the middle class actually, and you can find plenty of information about this. The movement has everything to do with perception, not reality. Racism is at its core.
I understand that we have the power to elect these officials, and we are to blame when it comes to the people who are in office. We keep voting them in. What you are leaving unsaid (as pointed out by str8line) is just who the blade of the guillotine is. It's Trump. I have no idea what would lead you to believe that Trump has any intention of serving anyone other than himself and perhaps his family. The way he has pandered is historical, and his supporters are so gullible that it is tragic. Trump has proposed nothing even remotely concrete that would aid the middle and lower classes. The man's castle is made of solid gold, and he doesn't even know that jeans exist. Hardly a spokesperson for the less fortunate of the world. He is much more like the monarchy of the French Revolution than anyone who has run for the presidency in the last thirty years. Also, don't forget who rose from the French Revolution, Napoleon. The Alt-right doesn't sound that far off with Trump.