Dealing with sinful Jews

 Sefer Chasidim (76) Do not punish an Israelite, nor curse him but pray for him that G-d make his heart whole and return him to right conduct. Do not invoke judgement on him saying, “The Lord should avenge me from his hand and visit evil upon him according to his wickedness.” For he who invokes divine judgement upon his neighbor, the attribute of justice comes before G-d, and says, “Lord of all the Universe, shall we then acquiesce to his request? he is deserving to be punished for such and such…