Why don Jews accept Jesus as the Messiah?
The simple answer is that Jesus never accomplished the Messianic prophecies (see answer above). The Messiah (Moshiach in Hebrew) will be a human who is born as a direct descendent of King David through Judah and Solomon. He will be proceeded by Elijah who will announce his arrival and there will be an ingathering of Jews to Israel from all corners of the earth.