#On what did Jesus base his statement about the Pharisees that they would die in their sins?

Jesus based that statement on his knowledge of them, that they were from below, he was from above. They were of this world and he was not of this world. [8:23-24]

#How could the Pharisee escape dying in their sins?

Jesus said they would die in their sins unless they believed that I am. [8:24]