I think the problem begins there, and it's one of cognition. The guns are "tools of the trade". Guns don't make bad guys bad any more than forks make people fat. Take away their forks and they'll use spoons or their fingers.
My dad was born in Jersey City (in 1900). It's been run by Democrats since before he could vote.
So they go after guns instead of perps.
Nuff said.
My prayers for the detective and his family, and the others injured.