He was whacked because Lenny Simon--a jealous creep who'd still be driving a cab if it wasn't for Ralph and Barney--got into Farby's ear, and Farby was always a little jealous of the monster earners in that family. Especially the younger guys. But you say tomato....

But you're correct. Because at the end of the day "skimming" was the excuse they used to justify the hit.