Seth Rogen compared “American Sniper” to Nazi propaganda on Twitter, and Dean Cain immediately fired back. Dean, who co-starred on the 2012 NBC reality series “Stars Earn Stripes” with the subject of “American Sniper,” Chris Kyle, Tweeted, “Seth…I like your films, but right now, I wanna kick your ass. Chris is an American Hero. Period. Go to war. Then we’ll talk.
