I guess the reason why I think that peoples parents and family would not ACTUALLY do something like this......is because lets face it......JW's are all talk. They live in an alternate reality of sorts in some ways, but when push comes to shove, most cave.
How many people faced with life or death decisions regarding blood and don't have someone watching them chose the transfusion? LOTS!
How many make excuses or allowances for their own behavior like a liitle medicla weed, a cigar now and then, too much booze, flubbing their time card......LOTS!
Even the overly zealous parents, when faced with throwing a large stone at the head of their kid buried in the sand would not be able to do it. Even those of you with complete jerk parents. Disfellowshipping, shunning, expectation that you may die......all of these things are a far cry from cold blooded brutal murder with your own two hands. Very few humans are capable of this type of bloodshed. These people that did this in Pakistan live a life centuries in the past culturally speaking. A JW in a first world country, may be living in the 60's culturally at best.