At this point I don't think people know why the Farook couple did what they did, but there are suspicious circumstances like their computer missing a hard drive and their cell phones broken.

Supposedly, these people were connected to those that the FBI were already investigating for terrorism threat, and if so, then there is even more cause for their names to be known, because we need to be able to non-ignorantly to discuss specific successes and failures of the FBI. That, and striking things from public discourse is very dangerous.