Short answers, pulled from the story.
The word Messiah originates from the Hebrew verb masha, meaning to rub with oil, a physical act that transformed ordinary men into sacred vessels of divine authority. In the ancient world, this ritual was applied to kings, priests, prophets, and even the altar itself. The Hebrew Bible records this anointing being performed on Cyrus the Great, a non-Jewish Persian king, to designate him as God's instrument for rebuilding the Temple in Jerusalem.
The Jewish concept of the Messiah never implied divinity, as he was a mortal man and a great charismatic leader who would usher in an age of global peace. In contrast, early Christians reinterpreted the figure as the Son of God, a divine entity who fulfilled the prophecies of the Old Testament through his mission, death, and resurrection. The Jewish faith maintains that the Messiah has not yet come and will remain a human descendant of King David.
Sabbatai Zevi was active throughout the Ottoman Empire in the 17th century and claimed to be the Jewish Messiah before gaining a massive following. He converted to Islam under duress, becoming known as perhaps history's second most famous false messiah. His conversion shattered the hopes of his followers and left a scar on Jewish history that persists to this day.
In Islamic tradition, Jesus is known as Isa, the son of Mary, and is revered as one of the most important prophets alongside Noah, Abraham, Moses, and Muhammad. Muslims believe that Jesus was not crucified but was raised to Heaven by God, who created a resemblance to appear exactly like Jesus who was crucified instead. Sunni Muslims believe that Isa is alive in Heaven and will return at the end of times to defeat al-Masih ad-Dajjal, the false Messiah.
The Ahmadiyya Movement, founded by Mirza Ghulam Ahmad in the late 19th century, believes that the terms Messiah and Mahdi are synonymous and refer to the same person. Mirza Ghulam Ahmad, who lived from 1835 to 1908, claimed to be the Promised Messiah and the Mahdi, fulfilling the prophecies concerning the second coming of Jesus. Unlike mainstream Muslims, Ahmadis do not believe that Jesus is alive in Heaven but that he survived the crucifixion and migrated to the east, where he died a natural death.
In Druze manuscripts, Jesus is considered the Greatest Imam and the incarnation of Ultimate Reason, the first cosmic principle that governs the universe. Druze doctrine holds that Hamza ibn Ali was a reincarnation of Jesus and the true Messiah, directing the deeds of the messiah Jesus. Hamza took Jesus down from the cross and allowed him to return to his family to prepare men for the preaching of his religion.