Two camera angles, the sound of the puppy is wrong, the looks on the guys face...the things said.
Sorry, I will absolutely give our guys who volunteered to put their lives in harms way the benefit of the doubt before reacting badly towards them over something from YourTube that is so clearly a staged video.
If it is proven that two active duty Marines did this, they should be punished by the military according to the UCMJ...not by a bunch of people safe at home posting on a web forum whose sensibilites have been offended.
I think it worked, judging by a few of our liberal posters kneejerking on this from the start.