All of this is of course besides the point that Fanon and Césaire were more or less right when they said, in effect, that fascism is just colonialism applied against people in the imperial core. You literally can't separate either fascism, or genocide for that matter, from the historical application of colonialism because the former creates space for the latter.
Even Bob Paxton recognizes the Slave Power South as a fascist state, for example. Heaven forbid folks ever do any reading tho...