So who was responsible for Christ's death?
First, though many of the common people were for Him, it's true that the leaders of the Jews plotted His death.
Second, it was Pontius Pilate who sentenced Him to death, despite the fact that he knew that He was innocent, and it was Roman soldiers who crucified Him. Both Pilate and the Roman soldiers were Gentiles.
Third, it was God's purpose for Christ to die, so that a way might be opened for sin to be forgiven. So He had some responsibility too.
Fourth, Christ allowed them to take Him and crucify Him.
Fifth, it was my sin and your sin that put Him on the cross. If I hadn't been a sinner, or if you hadn't been a sinner, it would not have been necessary for Christ to die.
So who then can point a finger at whom?
Jesus is not only the Jewish Messiah. He's the Saviour of the world. He died not only for Jews, but for Gentiles. Not only for Christians, but for non-Christians. Not just for those who wanted Him, but for those who didn't. "For God so loved the world that he gave his only begotten Son, that whoever believes in him should not perish, but have everlasting life."