This is such a shame. Robert Thurman claims to be an expert in Buddhism but his action is very un-Buddhist. It is very shocking to see him hiring hackers to attack Dorje Shugden followers.
A real Buddhist will respect everyone regardless of their skin colour, belief or opinions. After all, our world is made up of different colours, cultures, beliefs, practices, etc. We cannot expect everyone to think the same as we are.
It is disappointing to see someone like Robert Thurman who preaches Buddha's teachings and at the same time shows so much hatred and anger. What has Dorje Shugden followers done to him? His action will only make things worse.