Even the Pharisees and the Sadducees needed repentance

The gospel of repentance and remission was FIRST preached to ALL the chosen Jews. 

Many Jews, among them even MANY Pharisees and Sadducees, got baptized and, thus, were able to recognize Jesus as their Messiah YHWH unlike those of them who rejected the baptism of John the Baptist (Luke 7:29-30). In other words, there is no shame for the modern Jewish Pharisees and Sadducees to repent and believe in Jesus as the Savior, Redeemer, YHWH the Holy One of Israel (Romans 10:9-11). 

Whatever our core belief has been, we, all the Israelites and Gentiles, must repent and submit our theological babblings to Moses and the Prophets (Luke 16:29-31) for validation unto real salvation by following AFTER Jesus (Matthew 10:38).

Not all the Jews rejected the repentance message of John the Baptist and of Jesus. Those baptized elite believers did not cause that they were uprooted out of Israel because of the principle of James 2:10. All Israel must have repented for God to intervene and deliver them as it was also the case for Nineveh.

Matthew 3:5-9 ASV
(5)  Then went out unto him Jerusalem, and all Judaea, and all the region round about the Jordan; (6)  and they were baptized of him in the river Jordan, confessing their sins. (7)  But when he saw many of the Pharisees and Sadducees coming to his baptism, he said unto them, Ye offspring of vipers, who warned you to flee from the wrath to come? (8)  Bring forth therefore fruit worthy of repentance: (9)  and think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham.