The ox knoweth his owner and the ass his master's crib: but Israel doth not know, my people doth not consider.
The cause is known and easy; all the world knows it except Jews. The prophet Isaiah said the reason.
The Torah came because of the processing for the coming of Christ and all the prophets predictable him. The place of his birth, and his birth from a virgin, and he would be crucified, die, and rise from the dead on the third day, and ascend to the heavens.
All these were happened before the eyes of the Jews people, but they denied. They were afraid of the loss of religious authority. Jews and still waiting for the coming of Christ
Christ told them: Matthew 13:15
"For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them."