Au Canada, le juron francais que j’entends est ‘tabarnak’, ‘calice’, ‘ostie’ au lieu de ‘fuck.’

(So I was surprised)

Yeah. A French equivalent could be “Nique l’extrème-droite”, but that would come out as ruder. Both words have the same literal meaning and same use in their respective language, but when " fuck" is used in French, it’s further from it’s literal meaning. “Fuck X” is then always perceived as a vague statement of hostility towards X, without the sexual connotation.