Yeah, there’s being upset about having your child taken away (which happened because the authorities found out she’s an active, high ranking Nazi gang member and criminal – Coil didn’t take Aster away any more than a snitch gives the mean kids detention) and reacting a little harshly to that, which is quite understandable,
and then there’s wiping out entire neighborhoods with people inside and directing subordinates to commit additional premeditated mass murder as a form of extortion against the authorities and the perceived snitch.