Seriously, showing "Bowling" might be over the top, unless the instructor also provides an alternate view or arguments. Still, (if this is high school) the kids should be able to discern for themselves if a teacher is spouting BS or not. I wanted my daughters to be exposed to as many diverse views as possible.
I remember all the propaganda my history teachers tried to sell me about Vietnam when I was in high school. I didn't buy it. It never bothered me when a teacher had different views than me.