There are a lot of theory's and one of them at least is likely to be correct. One that keeps getting dismissed too quickly is the b word. People keep saying the the Argentina incident a few days before is not linked and therefore not relevant. Is that true? Was the same airframe involved?
Either way nobody knows what happend yet as the CVR and FDR have yet to be located and the wreckage has only just started to be picked up for examination. Lets hope they find the cause of this loss soon to help all of us (and you) understaand if this was just a terrible acccident or something that could have easily been avoided.