[jeromegv]

What if that ideology encourages violence against a certain class of people? Must that be protected?

[TheAdamAndChe]

The trouble is that what is considered "violence" varies from person to person, and from ideology to ideology.

[SpicyLemonZest]

You don't have to protect the actual calls to violence. But if you don't protect the associated ideology, you're going to end up excluding basically all politics. I've never seen a large political movement that didn't contain a few bad actors promoting violence.

[steveeq1]

In the same way that gangsta rap music is protected, yes.