I have a question about water boarding?

I have seen non stop posts on here about how bad water boarding is, how the Republican party love to torture people with it, how bush should be put in jail for it and so on and so on. Now let me ask you people this.....Why was there not an up roaring over the American citizens that had their head cut off while still alive and posted on our internet for their family members to see? Lets weigh this out for a second......Getting your head cut off while still alive ORRRRR having your head dunked in water but pulled out before anything bad happens to you? Hmmmm....So why all the craziness over water boarding? It's against the law for people to cut other peoples head off in Iraq, why not try to put them in jail??