It sounds like an electrical fire to me. So based on what has been released thus far, it doesn't sound like terrorism to me. Ironically, I think the early data indicates this one is an electrical issue. It all tends to make sense. Pilots could have tried to clear the cockpit by opening up the windows. An electrical fire like that is a disaster. Smoke and gasses limit visibility. Pilots can't see their controls, and the gas will poison them in minutes. It's a horrible scenario. It's a no win scenario. Rapid depressurization is survivable. Smoke isn't. Inability to control the aircraft isn't survivable either.