He was talking specifically to the Jewish leaders, who were not the ruling class (the Romans were, followed by the King of Judea), because they were keen to justify killing using the Scriptures.
https://www.gotquestions.org/Sadducees-Pharisees.html The Saducees and Pharisees were the corrupt Ruling Class under the Roman Empire - just like the Zionists are considered "Jewish Leaders" today - despite their preaching a Satanic Heresy.
"FOR YOU ARE THE CHILDREN OF YOUR FATHER
THE DEVIL,
AND YOU LOVE TO DO THE EVIL THINGS HE DOES.
HE WAS A MURDERER FROM THE BEGINNING. "; JESUS THE MESSIAH TO THE JEWISH LEADERS:; JN 8:44