Visit any major Hollywood studio and you will notice several obvious layers of physical protection they have erected around their property since 9/11.
It probably gives them a false sense of security.
I think they are scared. They don't want any fatwahs or dog poisonings, so they just ignore the most compelling issue of our time and appease the CAIR pitbulls.
During and after WWII, there wasn't much to fear from U.S. Nazis, so filmmakers could portray them as the devils they were.