This ricin revelation is getting too much hate imo.
Jesse had already figured out what really happened, but Walt was able to manipulate him back then. The thing is now Jesse has finally realized that Walt has been playing him since the very beginning. He doesn't believe anything Walt says anymore, which was made quite clear in the first scene of this episode (and also when Walt was trying to convince him he didn't kill Mike in the opener). Its not much of a stretch that when Jesse was standing there clutching his pack of cigarettes, realizing he had been pick pocketed he thought about the last time he lost something. Only this time he sees right through Walt's lies.
You had Saul do it. I went to his office. He called me and just had to see me today. His big Man Mountain body guard patted me down and that’s when he must have stole it off of me, right? Was that the plan?
Jesse had already figured out what really happened, but Walt was able to manipulate him back then. The thing is now Jesse has finally realized that Walt has been playing him since the very beginning. He doesn't believe anything Walt says anymore, which was made quite clear in the first scene of this episode (and also when Walt was trying to convince him he didn't kill Mike in the opener). Its not much of a stretch that when Jesse was standing there clutching his pack of cigarettes, realizing he had been pick pocketed he thought about the last time he lost something. Only this time he sees right through Walt's lies.