I would just like to establish what is meant by "Far Right".
I think a lot of misunderstanding occurs in politics as everything is lumped under a Left-Right distinction. (Left being more government services, Right wanting fewer.) It helps to see an additional axis to this: the Authoritarian-Libertarian one. (Authoritarians want increased regulatory powers, Libertarians want less.)
Fascists are Authoritarians, to the Right. Stalinists are Authoritarians to the Left. (These Antifa types are Stalinists, I think.) Hitler was very Authoritarian, and people (mistakenly) describe him as extreme Right. He was in fact more centrist than modern day politicians like Margret Thatcher, though more Authoritarian.
My interpretation of the Alt-Right is that it is a reaction to Authoritarianism. Usually, the Right (the Republicans) were thought of as the most Authoritarian (in Europe, anyway). If people didn't like that, they could vote for the Democrats. But in recent years, the two parties came so close to each other, to capture the middle ground voter, that they became almost the same. The Democrats began to exceed the Republicans in terms of Authoritarianism. Voters became so sick of a lack of an alternative that the Alt-Right came into being.
The Alt-Right is a group that have stepped outside the Overton Window, that kept the focus on the (false dichotomy) of two parties. It has attracted people from both sides of the Left-Right spectrum, as it is a movement away from Authoritarianism, I believe.
You all may think differently, though!