Actor Gary Sinise has blasted former U.S. politician Howard Dean for branding cinema-goers who want to attend screenings of American Sniper "very angry".

The Forrest Gump star, who has been honoured on a number of occasions for his long term support of military veterans, was incensed by an interview Dean gave last week (ends25Jan15) about Bradley Cooper's new war movie, which tells the tale of U.S. Navy Seal crack shot Chris Kyle.

The politician told U.S. Tv host Bill Maher, "There's a lot of anger in this country, and the people who go see this movie are people who are very angry."

Sinise took issue with Dean's remarks and posted a lengthy message on his account, writing, "To Howard Dean, I saw American Sniper and would not consider myself to be an angry person. You certainly have a right to make stupid blanket statements, suggesting that all people who see this film are angry, but how is that helpful sir?

"Chris Kyle's story deserved to be told. It tells a story of the stress that multiple deployments have on one military family, a family representative of thousands of military families. It helps to communicate the toll that the war on terror has taken on our defenders. Defenders and families who need our support. I will admit that perhaps somewhere among the masses of people who are going to see the film there may be a few that might have some anger or have been angry at some point in their lives, but, with all due respect, what the hell are you talking about?"

American Sniper has proved controversial since its U.S. release earlier this month (Jan15), with a number of celebrities including Seth Rogen and Michael Moore coming under fire for their opinions about the movie.