The commentators ask: Who permitted him to commit suicide; it is evident from the Gemora that this laundryman was a wise man and a Torah scholar?
Ben Yehoyadah answers: This roof was not high off the ground and his intention was to fall on his feet. He did not wish to kill himself. His plan was to injure his feet that it should serve as an atonement for not attending Rebbe’s funeral procession. Heaven turned his plans around and he fell backwards, breaking his neck and bringing about his immediate death.
The Rama Mipano in his sefer Gilgulei Neshomos writes that Rebbe was the reincarnation of Avraham Avinu and the laundryman was the gilgul of Lavan. A laundryman whitens clothes as the name Lavan connotes. This was Lavan’s rectification.
He also says, along with many other commentators that Rebbe was a reincarnation of Yaakov Avinu and that is why the Gemora relates that Rebbe came back to life even after his death; this is because we know that Yaakov did not die.