The alt-right is not neo-nazi. What it does do is give a voice to white working class people. I don't doubt you'll find wankers among their ranks as you will with all political ideologies but they do not define the ideology.
if I were part of a movement where it is stated by some that Jews aren't people, or where people publish memes calling for the killing of Jews, I would either seek to get the movement to disown them, or get out of it quick. Part of the problem, of course, is that alt right is a chimera of the internet age with a loosely aligned group of people, some of whom claim when challenged that it isn't their real views, it's just a form of provocation, which makes them lying dickheads with not enough brains to know the danger they cause in my opinion. If you ever go into the darker parts of the internet where the alt right lurk, you'll find it has little to do with working class but appears to be a group of middle class, early middle age, anti Semitic, anti women, intellectual wannabes who appear to have stuck around the age of 14 with Beavis and Butthead as their idols.
In addition to the Neo Nazi Spencer - hailed by those seen as the face of alt right like Yiannopoulos (who is definitely not your pint of lager, ad_o) as being an intellectual leader of the alt right, we have, of course, Roosh with his charming little dog vomit posts about women, see link below.
http://www.returnofkings.com/100669/what-donald-trumps-victory-means-for-men