What's happening in Balochistan?

Balochistan is a huge mystery:

• Who's carrying out the target killing of Shias? 
• Are elements of the Taliban previously supported by Pakistan hidden away there waiting for the Americans to pull out?
• What countries have carried out anti-state activities there?
• How badly has the center ruled the province? How legitimate are the Baloch rebels' demands? What does popular sentiment lean towards?

I recently read this article purportedly talking about historical intervention in Balochistan by foreign spy agencies, and this article purportedly telling the rebel side of the story.

I don't know what to believe about the subject, and if you have sources I can read up, please pass them on.