Who could blame them? It seems the Jewish people have a long history of persecution. Pharaoh tried to murder them. The Romans and King Herod certainly did their best. Before the coming of the Messiah, Jesus, the devil was working overtime to stop his birth by annihilating the people he was to be born through and/or trying to kill him as a baby before he could set up his kingdom. When that didn't work, the devil deceived weak and fallible men to think they were doing God a favor by killing those who they blamed for killing Jesus. NONE of it was what God wanted. Those people who committed such atrocities WILL answer to God for them. They were NOT doing the work Jesus commanded.
You can't force someone to believe any more than you can force him to fall in love. The devil is STILL attacking the "chosen people" because he thinks he can thwart God's plans to fulfill ALL his promises to them as a nation and a people. The devil will NOT succeed. God will do as HE wills. Part of His plan is that he will bring his people back to their land and establish them again as a nation. That was fulfilled in 1948. One day, soon I believe, he will open the eyes and ears of his people:
And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem.
And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn. (Zechariah 12:9,10)
Interesting that you cite Zechariah 12.
The Gospel of John, Chapter 19, clearly says that Roman soldiers (not Jews in the future) ‘looked on him who they had pierced’.