This is false. German anti-Nazi laws are weaker today than under Weimar and the society is generally much more liberal.

Of course the reason why no nation has renazified is because Fascism exists as a boogeyman of the left rather than a reality. It is a completely discredited ideology. If you look at every public opinion survey, there are many more communists than there are nazis, even though morally both sides are equally odious.

If you could find a Nazi lurking about somewhere, rather than in the nightmares of radicals, they would never say "Real Nazism has never been tried". Whereas there are actually people claiming to be communists and insisting that communism deserves a tenth or eleventh chance. Nazism is a completely defeated ideology even as communism continues to try to come back from the grave.