What does 2 Kings 8:11 mean?

Hazael asked, Why are you crying, my lord? Elisha answered, Because I know the terrible things you will do to the people of Israel. You will set their fortresses on fire, kill their young men, smash their children, and rip open their pregnant women. 2 Kings 8:11 - Modern Text Bible

(Elisha foresees the violence Hazael will unleash on Israel, and it breaks his heart.)