How so? They both are essentially ethnic interest groups, with one working to subvert through advocating "hate crime" laws and stomping the freedom of speech, and the other being a more militant fringe, street soldiers of a sort.
"Crazy" Irv as a bad cop, and insidious Abe Foxman as a good cop.
and the JDL - definitely NOT police informers, $50,000 max budget to the ADL's 50 MILLION, and NO politcal capital is just silly.
The good cop - bad cop stuff is pure fantasy.
If you were a Jew in trouble and you went to Irv and Abe... Irv would receive you at his home. Abe, (if you had enough money or could do something for him) would receive you at his UN plaza address. Irv wouldn't care what others thought about him when he helped you. Abe would base everything on what others - particularly the Jewish community - thought - IF he even helped you.
Trust me, POLAR opposites.