Watching films with stepkids who have hypocritical and/or contradictory belief systems?

Watching DVDs w/step kids, they're Muslim from another country, ranging from 20-something to 10yrs old. Their father encourages and they believe that watching a film with grotesque violence--ppl’s heads being blown off, wild animals eating a person alive and other atrocities. However, for exp. they see a husband/wife do a three-second, goodbye kiss in an airport (like in the G/PG movies I rent) they will grab the remote and fast forwarding DVD in disgust. First I was perplexed. Now, months later, it's ANNOYING. Sometimes right after a kiss (quick or fast) the characters say something that is vital to the film. I often miss that b/c they FF it. Sometimes the youngest will FF b/c she THINKS a kiss MAY happen. One day when we were watching a PG Oscar winner they went to grab the remote to FF just before a kiss and I snatched it away and said, “You're being rude! U Don’t wanna see something, then close your eyes or look away.” They looked shocked at me but isn't what I said correct?