This is a weapon that will be deployed primarily against their own citizens.
You think those didn't start as restricted to some theater of war?
Go read up on the 1033 program. Or the DHS Grant Program, the Justice Assistance Grant program, or the 1122 program.
the reasoning for this is less exciting that you'd like. its illegal in war because war is anarchy, and ypu cant tell what chemical weapons an opponent is using, and so proportional response is the worst variation you can think of.
when theyre used by the cops, you know exactly what they are using, and there isnt a chemical weapon escalation worry
Wait, I'm hearing reports. Reports that literally no city has been burnt to the ground due to protests? None at all? And this HN account is just out of touch?