Failure of cabin pressure on a 737 that then results in a fatal crash happens..... how often? Every year? Every 5 years, Every decade? ......
Destruction of an aircraft do to piracy has happened how many times in the last 10 years?
I think it is valid to start with foulplay because we have had recent al queda warnings this week in turkey. Like it or not this is the reality. You are the one jumping to conclusions that it cant possibly be a terrorist event.
............ the passengers were not "freezing"..... the one said they were "frozen" .....(in fear).
It's best IMHO to start with an assumption that none of us have any idea what happened, and let the investigation go from there. The amount of speculation here is astounding, but then again, what would an Internet forum be without speculation. :-)