I don’t think there’s any doubt the Nazis are bad - which is why they’re a good example. When they’ve had power, they killed millions - the violence has already happened at an incredible scale, but you continue to defend their existence.

Surely you don’t propose atomising response to the individual level - that we only react to individual members of openly genocidal groups after they harm/kill someone, otherwise allowing the unhindered operation and growth of those groups?

Protecting openly genocidal groups’ speech is akin to protecting individuals’ rights to make death threats (even after they’ve killed a bunch of people) - the speech itself is harmful, intimidating minorities, and it’s a strong indicator of upcoming violence that you can prevent instead of waiting for innocent people to get harassed, attacked, and killed. Conversely, there’s zero social utility to the hate speech other than identifying genocidal cunts that are probably deserving of some violence, for the betterment of society - the ol’ paradox of tolerance.