[This is what he re-tweeted.](https://upload.wikimedia.org/wikipedia/commons/7/70/Swastika...) It might be in bad taste but arresting him and insisting he undergo re-education is crazy, and I can't believe you would defend it. No one gets arrested in the US for re-tweeting memes like this.
As for the rest, you're free to call politicians fat idiots without being arrested in the US, and once again, I cannot believe you would defend arresting people for that.
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.
As for the rest, you're free to call politicians fat idiots without being arrested in the US, and once again, I cannot believe you would defend arresting people for that.