"And most importantly, the plane was flying around at 5,000 feet, the only reason you fly an aircraft of that size that low is to avoid radar. So it was clearly hi jacked."
"If you think a oxygen tank ruptured etc nocking out coms, first thing pilots do when there is a loss of cabin pressure is drop to 10,000ft so everyone can breath"
So the only reason to drop to 5,000ft is to avoid radar, but then if the cabin losses pressure, you drop altitude so everyone can breathe and not freeze?
Sounds to me like he dropped to 5,000ft because of loss of cabin pressure.
