Oh jesus you naughty boy. Better luck next time.

[HopOnPop]

so, it requires much more than mere "advocacy." You have to be getting ready to unleash the mob.

Yes, in the specific case you cited, this was the principle argument. I got that. but the other cases I cited above were merely in regards to people who attempted to incite "people" to commit violence against judges, jury, and politicians...no mobs unleashed. I have no additional cases to cite (too late + too much beer = too lazy), but I am pretty sure a number of people (i.e. high level syndicated criminals, mob 'bosses', etc) have likely served time for inciting similar forms of violence against police, jury, judges, and perhaps even prison guards by simply being caught placing contracts out on these individuals.

If you don't like my criminal incitement argument, let me take another tack to support my case for criminal prosecution -- various forms of intimidation are also criminalized. For example, while people can display most any kind of thing on their own property for the most part, a burning cross isn't one of them (a case from Florida in 2006 sentenced a guy to 14 months for doing this this exact thing on his own front lawn). He was prosecuted under civil rights laws because this display is so obviously a form of group intimidation. This is perhaps another consideration a court might follow when addressing cases where people pull stunts like the one on display in the OP. It's hard to deny what this kid did wasn't at least a tiny bit intimidating to many who may worship at that location...and thus criminalization might be justified under civil rights violations too.