Doesn't change the fact that Nazis do not deserve free speech. That's one part of the current Russian policy that I agree with.
That's not the point. The point is that eliminating them requires the forging of a sword, and that sword is all too easy to use for purposes of oppression. Thus, it better to never forge the sword at all. Or, to use a medical analogy, neo-nazis and other extremists are the flu - nasty, and potentially dangerous if we're not careful. Trying to ban them is deliberately exposing everybody to smallpox.
Right now, most of the nations that have such laws are unlikely to misuse them, because they are countries that spent time under the jackboot within living memory and thus have bone-in knowledge of the dangers. Others are ruled by "democratically elected" rulers that use those laws to become emperors in all but name.
There is a very good argument for this too. In the states, neo-nazi and anti-semitic groups have been fomenting hate, and the recent attack on a synagogue could arguably be traced back to letting them have their own angry echo chamber. Which is unfortunately back online now. Because why the fuck not. Now, yes, blanket censorship is bad. But the USA really needs to get a grip on the trend being worked up by our president of angry right-wing terrorists. There were enough attacks in a few days that a man killing two black citizens and sparing anyone white in a Kroger went almost un-noticed. This is a problem that the current administration refuses to recognize and deal with.
There's a lot of means to solve this problem that don't require open censorship, as evidenced by the fact that these extremist groups were effectively neutralized for at least thirty years before their recent resurgence. Their resurgence is primarily caused by an existing major party openly encouraging xenophobia in a "correct" way after 9/11, which is a problem that no law could stop. On the other hand, consider the damage that could be done if a President who has openly called for his opponents to be imprisoned for dangerous extremism
actually had the power to do so.