There was never a doubt in my mind that Sex Pistols and Johnny Rotten were a fascist phenomena + bad music incl. spitting on each other and such. I could see it as an outgrowth of the skin heads from an earlier decade which later metamorphized into head-banging nazi youth. Not my cuppa.
The only surprise was the Anarchy in the UK and that was inspired by Viv W and Maclaren, the latter producing some minor interesting music pastiches in the 70s.