Europe has decided that the "slippery slope" argument needed to be taken into account: let such talk get too frequent and banal, and slowly you get to the point where these things (killing Jews and other hated categories) actually takes place. It happened once, it might happen again.

Maybe it's too conservative, but it is hard to dismiss given our tragic history. And frankly, I cannot be bothered about the freedom to blather obvious lies, especially when coming form people whom we know to have a racist and antisemitic agenda. (How do we "know" - because they keep on repeating these borderline things and behaving accordingly)

In the long run, we're all dead. John Maynard Keynes