Actually, I love war movies (specifically, escape pictures) -- they are probably my favorite genre. I love them for their creativity. I consider Stalag 17
to be a close to perfect film in a lot of ways.
I doubt that an anti-war film like The King of Hearts
or All Quiet on the Western Front
caused any sort of isolationism -- if that was happening, it was probably already there, yes?
Right now I'm rambling, bookmarking but I definitely watch war pictures because I genuinely like them -- they can be incredible pieces of cinema, and war is, by definition, an emotionally powerful scenario. The other thing is, I'm kinda wondering what you define as war pictures. Are they only ones that show combat, e. g. The Longest Day
or Saving Private Ryan
? Or are they, possibly, ones that deal with the fallout, like The Best Years of Our Lives
or Since You Went Away