Ask them who wanted to kill Jesus.
Here are the words of Jesus Himself to the Jews:
You are of your father the devil, and the lusts of your father you will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it. John 8:44