Violence in Entertainment

So, I went to see the movie Dunkirk http://www.imdb.com/title/tt5013056/ today. I was sickened by all the trailers.  I guess it might be logical to show trailers for violent movies at a movie about war, but that was all that was shown. Dunkirk was not about violence.  It was about a heroic rescue by civilians of military personnel, who suffered due to the violence of war.  The Dunkirk rescue was heroic.  And we do not recognize that enough.  We need to recognize heroism and acknowledge it publicly more often.