I'm sorry, dude, but you're just theorizing here.Hearts filled with hatred is why. They thought a mighty king was coming to wipe the romans out. A mere carpenters son showed up and told them they were wrong on certain matters. Their haughty hearts thought they were better than mere lowly flock members. They were fully apostatized at that point.
Now, I've asked you before, who has the power to not only forgive sin, but to give eternal life?