If Jesus didn't fulfill the prophecies then how come many Jews converted to Christianity after his "death" and if he did then?

Your question makes no sense.

Jesus was not the Messiah. Thus, most Jews did not convert to the religion that became early Christianity.

But if *some* did, what does that prove one way or the other?

Most of the converts were not Jews; the majority of Jews didn't convert, Christianity originally started out as a very small fringe movement from a small part of the Jewish population, and a good portion of those were Pagans who had converted to Judaism... as the Christian movement picked up it was mostly Pagan converts.

The fact of the matter: Because God cursed the Jews of unbelief, that is why they do not believe, and they will never belief even up until the end, only a few, only a remnant of them will believe, in the end, because the Jews were the first to hear God Holy Word and they will be the last ones to become saved, through the grace of God, read Matthew 20:16 read Ephesians 2:8 read Romans 6:23 read Galatians 5:17-23

A person can know with certainty Jesus exists and is God by practicing the Devotion to the Immaculate Heart of the Virgin Mary.

Thousands of Jews converted to Christ immediately after the institution of the church in 33AD.

Christ did fulfill the prophecies. The reason the majority of Jewish people dont believe on him is because he was not their messiah. Christ was a black Israelite from the tribe of Judah who spoke Hebrew! He was not "Jewish"

Jews do not accept Jesus as the messiah because: Jesus did not fulfill the messianic prophecies. Jesus did not embody the personal qualifications of the Messiah. Biblical verses "referring" to Jesus are mistranslations. Jewish belief is based on national revelation.

Specifically, the Bible says the Messiah will:

Build the Third Temple (Ezekiel 37:26-28).

Gather all Jews back to the Land of Israel (Isaiah 43:5-6).

Usher in an era of world peace, and end all hatred, oppression, suffering and disease. As it says: "Nation shall not lift up sword against nation, neither shall man learn war anymore." (Isaiah 2:4)

Spread universal knowledge of the God of Israel, which will unite humanity as one. As it says: "God will be King over all the world – on that day, God will be One and His Name will be One" (Zechariah 14:9).

Christians know that Jesus do not fulfill them that is why Christians counter that Jesus will fulfill these in the Second Coming. Jewish sources show that the Messiah will fulfill the prophecies outright; in the Bible no concept of a second coming exists....

Why OH WHY did Voldemort order Dumbledore's death!!??

WE KNOW it happened!! WE JUST KNOW IT!!

It says so IN THE BOOK!

Jews have been converting to various superstitions since long before Jesus was born.

From the golden calf fiasco at Mt Sinai to Yahweh's temples being adorned with the goddess Asherah - Jews have been playing the field ever since judaism was invented. Pharisees, Saducees, Sanhedrin and Samaritan - all influenced by other cultures and forming new divisions.

Christianity was sold as a new and improved version of judaism and like all of the other disciples who bought into it, other Jews would buy into it as well.