This is far more similar to Communism than Fascism. Their mentality is that they are a scientific vanguard (like Marxism) and that the ends justify the means. They also share the binary thinking of Marxists. They part company with Fascism because most of them are internationalist.
I've read plenty, thanks. The difference is that while I have read plenty of works by Marxists and their apologists, I don't just read books by such people. Maybe you should do the same.
Any ideology which says "the ends justify the means", or that it alone is scientific, is going to end up with a high body count.