If you wish to look at the bottom end of the scale,... Yes.
Here in Australia it's all covered under "Incitement" (Once called "The Riot Act") Punishments for which, ranged from a warning right through to the Death penalty when we had one.
These Laws cover all degrees of severity, from people who constantly provoke or incite others to commit a Breach of the Peace, right through to actively inciting Murder or Terrorism, and I'd say this case comes pretty much at the top of the list. No doubt it also falls foul of Laws on Racial and Ethic Hatred, and probably a dozen others.
In view of the two cases that I quoted in my earlier post, we can't say that we had no idea of the possible consequences.