User blog comment:Numnum22/DC characters with similarities to other villains:The Joker/@comment-2175012-20170108151710/@comment-26971023-20170108153519

Well, I'll tell you:

Most of these villains have a dark sense of humor just like the Joker, and they have been known to kill alot of people. Some are also archenemies.

Just like The Joker, Jafar does that maniacal laugh alot and fights a mortal vigilante.