If, by "worst for wargamers", we stick with WWII movies which will give them ideas that should never see the light of a game table, well…
Iron Sky.
(Technically speaking, the war is still going on for the Nazis.)
Other craptastical WW2 cinema-barfers:
U-571 (Still don't have my hearing back.)
Battle of Britain (So, exactly _IS_ happening in the last ten minutes, anyway?!?)
The Bridge at Remagen ("But" <sniffle> "who is" <existentialist weeping> "the enemy?" YOU ARE, you freakin' Nazi bastidge! You and your bosses!!!)
Tora! Tora! Tora! (Trying to watch it, I was convinced the tile was Japanese for "Stop! Stop! Stop!")
The Fighting Seabees. 'Nuff said.