Writing to this individual would be like talking to john kerry about releasing his medical records and his real record in Viet Nam.
So why bother, understanding will never be reached.
When he is standing in the streets yelling allah aka bar, put the bottom of the boot to his head and throw him into a pig pen.
Then another boot to the head.
You are right. Emails cannot change a victim fo hateful ideology like this Doctor Demento. But they can make his sordid life a little more miserable.