But I say to you, that whosoever is angry with his brother, shall be in danger of the judgment. And whosoever shall say to his brother, Raca, shall be in danger of the council. And whosoever shall say, Thou fool, shall be in danger of hell fire. (Matt 5:22)
Jesus is speaking of those not saved and/or those still under the Law. There is no judgement for those that are saved- we've already passed from death to life. The price has been paid for our sin by Jesus's death. The only time believers will face the judgement seat is when rewards are given in heaven- NOT for sins we've committed.
The thief on the cross was awarded heaven just by his faith-ALL his sins were forgiven at that time.