Warner Bros.

Needless to say, politics can bring out a lot of emotion. But so can watching someone in a convincing role. And when those two things combine, it can result in what happened Wednesday night when a group of people saw Bradley Cooper in attendance at the Democratic National Convention. 

Cooper was nominated for a best actor Oscar for his portrayal of Navy SEAL Chris Kyle in 2014's "American Sniper." The war movie was a hit among conservative Republicans, so some of them lashed out on the internet after seeing Cooper at the DNC.

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Bradley Cooper at DNC?! Guess I've seen my last Bradley Cooper movie. Ewww Ick

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I have a list of celebrities that support Socialism I refuse to spend another $ on. Add this one. Boycott them all. pic.twitter.com/uOFMkxSvRY

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People are upset that Bradley Cooper who played Sniper Chris Kyle is a democrat