We honour all in varying terms. My main objection is that which is said above. I am unaware of the Qur'an referring to any prophet as a Messiah. Perhaps you can show me an example. Note specifically that Jesus is called AL-masiiH .
Definite articles point to uniqueness and singularity.
Notice, one does not say, Jesus was the prophet in Islam. One says, Jesus was a prophet. Messiah is, therefore, as unique of a title as the Seal of the Prophets. Certain titles do make some of the prophets unique and distinguishable. Mere historical events and chronology effectively do this.