They were mentally and emotionally coarse to the point of primitivism. I mean primitivism in the bad sense. They were not only Jews who killed. They were also Jews who couldn't spell. And so they represented a release from all those centuries of suffering and spelling.
Weakness comes in many forms.
The perdurability of the Jews has been owed to their absolute refusal ever to stop thinking, to the romance of brains. It is not toughness that the Jewish gangsters represent, it is stupidity. He admires the elan vital of the dumb fucks. It is charming, I guess, to make the acquaintance of Knadles Nitzberg and Little Farfel Cohen. But it is not charming to learn that Mendy and a few other disordered characters tied Pretty up and sliced him to pieces with small knives, and threw the pieces of Pretty into a car and drove it to a desolate spot near the Brooklyn Navy Yard and torched it, and invited their girlfriends to watch.