"They have built worship sites to burn their children as sacrifices to Baal. I didn't ask them or command them to do this. It never entered my mind."

Nothing new here, mothers have been sacrificing their children to false gods for a long, long time.

Maybe someday your son and you will wake up from the illusion that killing and torturing others makes you safer or better off.

If your son really wants to "make a difference" he needs to stop the insane belief that killing and harming his fellow man is the way to do it.

You cannot kill your way to peace.