Does Blue Nile sell Israeli blood diamonds?

Blue Nile censors its Facebook page to avoid having to answer questions about the provenance of their so-called conflict free diamonds.

Are you blocked from the Blue Nile Facebook page? http://www.facebook.com/BlueNile

For the last three weeks Blue Nile, a NASDAQ listed company and the world’s leading online diamond retailer with its European HQ in Dublin, has censored subscribers to its Facebook page who questioned the provenance of their so-called conflict free diamonds. The company has blocked hundreds of people from accessing its Facebook page and altered it to prevent its 80,000+ subscribers from posting new threads on its Wall.

Having endured this for about a week the company restored the facility on Thursday 4th November, but, as more subscribers posted threads asking if any Blue Nile diamonds were crafted in Israel where revenue from the diamond industry funds war crimes and crimes against humanity , the company removed the facility again the following day and blocked more subscribers and their Facebook friends from viewing the site.

On the same day Blue Nile CEO Dian Irvine sold 50% (15,000) of her Blue Nile shares and Executives Chairman Mark C Vadon sold 75% (290,866) of his Blue Nile shares.

If you can access the page please post a question there. Ask why Blue Nile has censored those who asked where their diamonds are cut and polished and/or why Blue Nile executives sold large amounts of company stock on the day the company blocked subscribers posting new threads?
What has Blue Nile got to hide?