You do know why these laws exist, right? And they are not useless. Many terrible things happened, and tens of millions died, because an extremely hateful ideology was allowed to take hold by assaulting civil society and democracy.

Banning anything related to that ideology is not only needed, not only common sense, but I'd argue the moral duty of the German people. And everyone else who witnessed it (so everyone). And for what it's worth, most developed countries have banned Nazi-related things. The US is an outlier in thinking that Nazi opinions matter, and allowing murderous types to express their desire to murder others is somehow a virtue.

And to be clear, yes, National Socialism is extremely agressive and murderous. One of its core tenets, probably its main one, is violent antisemitism and "master race"-ism, with their solution being exterminating "lower" "races". Nothing useful, nothing good, nothing redeeming. Just pure hatred and genocide.

Nothing good can come out of "debating" a Nazi in the "marketplace of ideas". Goebbels himself said so back in the 1930s, that they do not intend to play by the rules of democracy, but if democracy wants to give them the tools to spread their ideology, they'll happily use it. The world saw this happen and saw the results. Nazis have no place in any civilised society, and anyone espousing Nazi ideology or sporting their insignia deserves to ostracised at least.