Oh, the historical fascisms such as under Stalin and Pol Pot, right.

it’s in principle undetermined in ideology

Correct in so far, as it‘s determined by economic system. Which happens to align with left/right ideology.

But the only principles really important for any kind of fascism are violence, anti-rationalism and amorphous ideology.

You’re making shit up depending on how your tummy feels, don‘t you?

Please stop using the internet.