Or perhaps, just perhaps, they're non-english natives who speak English as a second (or third, fourth, etc) language and have no knowledge or interest in absurd internet-american-english witchhunts?

Yes incels are utterly annoying despicable broken records of tediously uncreative low quality mental illness, i also strongly dislike them - but for monolinguist americans to start to paint with such an absurdly wide brush is far worse. Choose your bloody battles.