In principle you are right, but for some reason there are people who are vocally offended/displeased by the "fuck nazis" slogan. That's weird to me, because as you say this should be uncontroversial and yet here we are having this conversation.
I think this is because this is not actually about the words itself. Similarly, everyone agrees that black lives matter[1], but that words imply a certain political alignment that the person you're talking with may not subscribe. Similarly, by saying "fuck nazis" you will get reactions from people who, in principle, don't like literal nazis too, but feel targeted by that sentence anyway.
Sorry for my rambling thoughts.
[1] as in, nobody sane would unironically agree with "black lives don't matter"
I think this is because this is not actually about the words itself. Similarly, everyone agrees that black lives matter[1], but that words imply a certain political alignment that the person you're talking with may not subscribe. Similarly, by saying "fuck nazis" you will get reactions from people who, in principle, don't like literal nazis too, but feel targeted by that sentence anyway.
Sorry for my rambling thoughts.
[1] as in, nobody sane would unironically agree with "black lives don't matter"