Doesn't anyone find it odd that 20 years after WWII we have a sitcom about a German POW Camp, Hogan's Heroes and fighting in the South Pacific, McHale's Navy.

No one would even consider a sitcom about a Vietnamese Prison Camp 50 years later. It's repulsive.

Why wasn't it just as repulsive with those shows in the 60's?

I don't have the answer. Did Americans change?