Free speech stops at incitement and terroristic threatening.
I don’t see incitement in what he said. However saying that he “feels like” a terrorist who killed a bunch of people can definitely be read as an indicator for a copycat. Worthy of at least a preliminary investigation to see if there’s intent to commit violence.
Perhaps, but this guy is well known to the authorities as a person who courts public controversy as his bread and butter. He makes controversial comments, he gets publicity, and then he trades on that publicity to make a living. I don’t think there is any need for an investigation here, since they already know what he is up to.