What is the ruling concerning a Muslim who cursed and uttered inappropriate things about our Master Jesus, peace be upon him, in response to infidels cursing our Prophet Muhammad, peace and blessings be upon him, and how does he repent, and is expiation due upon him?

The Muslim's creed necessitates exalting and venerating all prophets, for they are the best of humanity and the light of guidance. Scholars have unanimously agreed that reviling or mocking the prophets constitutes apostasy from Islam. The believer does not differentiate between God's messengers, as Allah Almighty said: (Say, "We believe in Allah and what was revealed to us and what was revealed to Abraham, Ishmael, Isaac, Jacob, and the Descendants, and what was given to Moses and Jesus and what was given to the prophets from their Lord. We make no distinction between any of them, and we are Muslims [in submission] to Him.") And upon whoever falls into this sin is sincere repentance and return to Islam by uttering the two testimonies of faith and glorifying all prophets.