Can he pray behind someone who does not believe that Muhammad was the last of the prophets?

He is confused about what ‘Eesaa (peace be upon him) was granted of the power to give life to the dead

The humanity of the Prophets

The crucifixion of the Messiah between Islam and Christianity

He is asking: if the Prophets were physically perfect and protected from sin, how come Moosaa (peace be upon him) had a speech impediment and killed a soul who had done no wrong?

Belief in the Prophets and Messengers is one of the pillars of faith, not belief in the Messengers only

Infallibility of the Prophets

Could you tell me some of the deeds that the Messenger of Allah did during the Makkan period that indicate his confidence that he was indeed the Messenger of Allah?

Why do we send blessings upon the Prophet (blessings and peace of Allah be upon him)?

Is the hadith “Verily every Prophet has allies among the Prophets, and my ally is my father and the Close Friend of my Lord, Ibraaheem” saheeh?