So as a user you should actually be more concerned about what regulations exist in the region you're living, not of the region the server is histed. Because that's the law you have to abide by.
Worst thing regarding the law of the server position is, that your post will be deleted / account will be banned.
And in the context of Online behavior I would argue, that in general all American/European laws are the same.
If we want to talk about details: In germany a very serious crime that is activly enfored, is to downplay crimes of the nazis. Even something like saying "trivial thing x is as bad as what the nazis did" could be interpreted as such a crime.
Agreed, do not use Ubuntu.
But it's still miles away from Window... and technically you can get closer with a Linux System... e.g. Google Android.