I agree to a certain extent. My reluctance rests with the fact that there seems to be millions of these nutjobs in our country now. If we were to do what you suggest, who bears the cleanup costs? It might be more efficient to just drop them over the ocean.
But, if you insist on shooting them in the streets, at least let’s follow up with meat hooks, replicating Italy, 1945!
It should be noted that the partisan group that executed Benito Mussolini and his mistress Clara Petucci, as well as several others, was a Communist unit. Too, when the group's leader went to personally execute Benito, his British-provided Sten Gun jammed, enraging the Commander, who then borrowed a .32 caliber French SMG from a junior officer and dumped the entire magazine into Mussolini and Petucci, after which they were hung upside-down from the rafters of a Milan gas station.
If all you're worried about is an excess of bodies, feed their dead to pigs.