By far the most alarming has been the response of some Twitter users who have suggested they were driven to thoughts of killing Arabs by it.
Clint Eastwood's latest film stars Bradley Cooper as Chris Kyle, the most lethal sniper in US history, as he fights four tours in Iraq.
The movie, which has been nominated for six Oscars, has been widely criticised for supposedly promoting Islamophobic propaganda, glamourising the invasion of Iraq and propagating racial violence.
Kyle's hatred for Arabs, who he called "savages", was actually toned down quite substantially for his book's journey through Hollywood and focused more on his battle with his own personal demons, but that didn't stop a large chunk of people completely missing the point.
The Huffington Post UK has chosen to blur out some of the language contained within these tweets.
'American Sniper' has been panned by some, with stars such as Seth Rogen and Michael Moore speaking out against the biopic.
Rogen refers to 'Stolz der Nation', a fictional Nazi propaganda film from Quentin Tarantino's 'Inglourious Basterds', in which a German sniper picks off 200 Allied soldiers single-handedly.
'American Sniper' broke the all-time record for January box office takings, pulling in over $90m (£59m), and continues to ride at the top of the movie charts.