Apparently, Facebook is hard at work investigating and shutting down left-wing extremists. If they were serious about that intent, they would have voluntarily shut down their entire business.
In fact, I'll go so far as to accuse Facebook of engineering these pages only to publicly shut them down to appear nonpartisan. It's a similar mechanism the government uses to engineer crises in order to justify their continued existence and continued expansion of their budget and power.
Do I have any evidence? No. Is the accusation consistent with Facebook's soulless corporate behavior? To a T.