I haven't looked at the particular case, but nazism is a particular thing - given Europe's history it's there for a very good reason in most EU countries.
I don't know about the 'fat idiot', but in most EU countries that's more than fine so I have a bit of a hard time believing that was the sole reason - public figures are fair target for stuff like that. The limit is actually planning or inciting violence against someone or a group - again, the same as in the US.
Yes and US guys are plain wrong on swastika thing - you could even financially support open nazi militants like Azov battalion from most EU countries without any consequences.