It would be ironic if, as a protest against a government's alleged assault on democracy, an individual were to deprive a couple of hundred others of their democratic right to self-determination. It would be an empty gesture too, unless a statement was made to explain the reason for the person's actions. It seems there was no such statement made, publicly or privately. No doubt, if there *had* been such a statement, the government would not be reticent about revealing its existence, if not its content.
If we are to continue to explore the possibility of pilot suicide, it should be considered that Islam (I think Capt Zaharie is Muslim, we have already heard from the Imam at FO Fariq's mosque) takes the same dim view of suicide as does Christianity. A devout Muslim would consider it a crime against Allah, just as a devout Christian would consider it a crime against God. Of course both religions also take a pretty dim view of the slaughter of innocents. This both makes pilot suicide seem less likely, and perhaps explains why a suicidal pilot might choose to engineer an unexplained disappearance over a straightforward plunge into the South China Sea. Of course a suicidal B777 pilot could probably have borrowed or hired a light aircraft and done the deed with far less questions and without the loss of his passengers, colleagues and friends - assuming it was premeditated.