No tolerance for the intolerant.
"No tolerance for the intolerant" was the most predictable thing you could say and is incorrectly weaponizing a philosophical theory to try and justify preemptive street violence.
A true threat involves immediate, impending violence. Self-defense applies to imminent physical harm, not to hearing a political statement you hate.
The supreme irony is that using physical violence to forcibly silence people with opposing political views is the absolute pinnacle of intolerance.