The latter shouldn't be a huge shock. As was mentioned earlier, Fascism was invented by former Marxists (largely Socialists) who understood that Internationalism was destined to fail, and also grasped that a completely command economy without private property makes no sense in reality and dehumanizes people. A lot of them wrote extensively on Marxist ideologies (Mussolini especially) and if someone gets into Fascist writings they're guaranteed to read at least one critique of some kind of Marxist thought by a former Marxist.
I might be delving into conspiracy territory saying this, but I think that part of the reason most Marxists and derivatives can't identify Fascism properly is that Marxists actively discourage and restrict access to Fascist literature because it's so amenable to fellow Marxists dissatisfied with Marxism. It's damaging to their monopoly over anti-capitalist rhetoric when Hitler's famous Speech at the Siemens Factory is perfectly in-line with the dialogue of speeches given at, say, Occupy Wallstreet.
The last thing a radical leader wants is fellow radicals deciding to embrace another ideology.