My response would be “With all due respect, sir, GFYourself.”
Reminds Me of an E-Mail I received from "Downtown" when I was working at The City Water Treatment Plant.
In short it consisted of don't pick on the mudslimes.
I Replied to what I thought was just My coworkers at the WTP and I basically said F-them and when they stop murdering innocent people around the World I might be open to discussions about their feelings.
Well, Ol' Fumble Fingers managed to choose the "REPLY TO ALL" and My E-Mail went out to the ENTIRE City including the Mayor and Highly Ridicules.
Things were a bit tense the next morning... But I kept My Job.🤪