And since crime families don't involve the police, it makes it harder to solve. Same with the Jews involved with the crime families. As far as I am concerned, ALL crime family members can kill each other: Just leave the innocent out of it.

Intra-political / religious rivalry or inter-political / religious rivalry. Very common. Look at all the Sunni vs Shia vs Sunni violence. Being killed for espousing anything contrary to your party's belief is reason enough. For all we know, they favored the wrong football team.