What is the point of episode 16?

Just rewatched episode 16 and while it gives a nice insight into jets past and to what happened to his arm, I find it quite confusing what the point of jets/ fads mission was.

Why does fad call jet to help him kill udai? Did he want to get rid of jet and udai (still working for the syndicate?) But then again jet wasnt even a cop anymore so calling jet wouldve been kind of pointless.