Same here. There is something wrong with two stolen passports on board. I really dont believe in coincidences
I can come up with a quick scenario where it is coincidence as well though.
International crime group who, among other things, sells stolen passports to people who otherwise couldn't get a passport. Two people, traveling together, from Malaysia or originating elsewhere, who want to go to Beijing but fall into that category of people who wouldn't be able to obtain valid passports for whatever reason so they buy a couple stolen passports so they can go where they want. Whatever reason is blocking these two people has nothing to do with the loss of the aircraft and ultimately they are just two more unlucky passengers on a doomed aircraft.
Not saying that is what happened, but it is a plausible "innocent" explanation for the stolen passports.