This is quite similar to the late 19th, early 20th french ultra-right. Religious nutjobs and nationalists pretending their country is ruled by the antichrist, jews (or in this case, black muslims) communists and socialists. While they don't have a huge electoral basis, they certainly are well-known, and sometimes respected and well-educated people.
They have a certain idea of America, and whoever disagrees with them is obviously wrong and ought to be eliminated. This is indeed very close to fascism (it is fascism in my opinion, but I guess people might disagree).
At least, Charles Maurras and his friends from L'Action Française used to be a decent writters. Most of those folks could hardly write a coherent and thought-out book. The amount of conspirationist mumbo-jumbo they have to put together probably doesn't help.
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