"R.I.P. to the 2,996 Americans who died in 9/11. R.I.P. the 1,455,590 innocent Iraquis who died during the U.S. invasion for something they didn't do," the post read. Aside from deleting the post, Grenier has not yet spoken about the public backlash surrounding his remembrance.
ET has reached out to Grenier's rep for a comment and will update this story with a statement as soon as possible.
Several 9/11-related posts remain on Grenier's account, including one with a caption reading: "In challenging moments and times of mourning, we must seek perspective to help us find peace within our choices forward." His account bio also links to a story on the Authorization for Use of Military Force, a law signed by President George W. Bush in the hours after the attacks of Sept. 11, 2001.
Not one to shy away from controversial topics, Grenier produced the documentary, How to Make Money Selling Drugs, in 2013 and called on celebrities like Eminem, Susan Sarandon and Woody Harrelson to speak candidly about Hollywood's drug problem. Get the story in the video below.