Firstly, not "ALL" the Jews were involved in the death of Jesus.
It was primarily the Roman Political appointees to the High Priesthood,
from the "Sadduccee" party ((who rejected all of the Tanakh except the five books of Moses)) and SOME of the Pharisee Party, a group of whose Scribes followed Jesus around, harassing him and trying to trip him up on every point, and even accusing his miracles of being Satanic. But not even "ALL" the Pharisees were involved in this, either.
Still, even though that is the case,
those who DID oppose Jesus actively, for wrong motives, were, as Jesus Himself said,
"Filling up the measure of the Sins of their Forefathers who stoned and killed the prophets from" the beginning of the Nation's history. Not always, but like any society, Israel would go through cycles of purity, then fall into idolatry
((and the Prophets would warn, rant and righteously rage against it, and for that faithfulness, the ones who WERE apostate from God, would have them killed. King Manasseh was a horrible example of this. According to rabbinic traditions, King Manasseh personally ordered the holy Prophet Isaiah
to be SAWED IN HALF while alive. He was truly a monster, yet many years later, even HE repented and was forgiven by God and restored to the Throne of David --- remember that when we are howling for someone to be executed, God restored that mass-murderer Manasseh not only to forgiveness, but to the very Throne of David in Jerusalem too))
or other forms of infidelity. Israel went through periods of greatness, followed by periods of spiritual declension/apostasy, and the Tanakh (the "old testament") is literally chock full of examples of that.
Jesus, in attacking HIS generation for apostasy and general infidelity, wasn't doing ANYTHING different from what Holy Prophets BEFORE him had done, and were killed for it because they felt INSULTED by the Prophets's warnings, exposes, and condemnations of their unfaithful or hypocritical behavior. He warned that many in his generation,
even many of those who didn't OPENLY and actively oppose him, were living very sinful and hypocritical lives. And he warned that a judgment would fall on that generation.
There were a lot of good Jews, including among those who never officially became Christian, but at that time, if we believe our LORD, and I DO, the bad outnumbered the good. He could read hearts, we can't do that. Yet, hanging on the Cross, while some of the religious leaders and the common people were walking by and mocking and insulting him and spitting at him and making fun of him, he said, in all sincerity and truth,
"Father, FORGIVE THEM, for they DON'T know (i.e. realize) what they are doing."
In other words, most of them, even among his active opponents, had NO IDEA who it was that they had actually deemed to be worthy of death as a blasphemer. It didn't "register." They aren't alone. People of all races and religions do the same thing every day when they hear God's word, whether from the Old (tanakh) or New Testament. They feel they know better, and they attack those who try to get God's Word and will across to them.
But they saw miracles!! Yes, they did. But even the Old Testament warned the Jews that if a man even worked miracles, but tried to turn the people away from their Religion, he was to be condemned, miracles or not. These folks, when Jesus said things like,
BEFORE ABRAHAM CAME into existence, I AM, they were horrified by those remarks, and took up stones to stone him. This was a man well under 50 calling himself by the Divine Name. And a miracle or two that one has seen, is not evidence enough for such a claim. Most who had seen his miracles, had only seen one or two.
The group of Pharisee Scribes who followed him around, however, saw him do things that no other man had ever done or could do, and do so innumerable times. THESE men were warned against Blaspheming the Holy Spirit by calling him demonic in the face of mountains of miraculous evidence. But most first century Jews, even among his opponents in Jerusalem, didn't fall into that category, which is why he cried out to the Father to FORGIVE all of them, on the cross, because they truly DIDN'T know or realize just what they were doing by approving of his death and mocking him.