FLINT, Mich. — Veterans are threatening violence and murder over a satirical cartoon of American Sniper author Chris Kyle drawn by film director Michael Moore, according to chatter on veteran message boards reviewed by Duffel Blog.

Moore’s illustration, which he released on Twitter, displays Chris Kyle shooting a crippled Iraqi girl in the back as he gives Uncle Sam a handjob on a pile of dollar bills.

“You just can’t question a war hero like Chris Kyle, or the book he wrote to glorify himself, or the movie made by a Hollywood star interpreting that book,” said former Navy SEAL Tom Lancer in one of several hundred "open letters" to Michael Moore. “You have no right to voice an opinion against any of us who defend the Constitution and its immutable freedoms.”

Comments by other veterans range from, “I will beat your ass, Michael Moore,” to “Watch ur back, I’m a sniper.”

Michael Moore, who is currently teaching a military history class on Rules of Engagement at the University of Michigan, sa…