If you feel your life is in danger you are justified in using deadly force in most places. Looking at the arson, police shootings and black on white murders and assaults these thugs have done in the past, I would feel justified. If they don’t want to be treated like crimminal thugs, they should not act like one.
There are all kinds of degrees of threats too.
If they’re just going to stand in a line and chant stupid crap I would ignore them but if they’re singling out individuals and surrounding them etc, it has escalated to the point where displaying a weapon may be warranted.