History is full of attacks on intellectuals, sometimes because of religion, but most often to promote the power of an uneducated dictator or warlord. There's a great quote from the movie "The Last Emperor", something like: "Yes, many heads have been...

So exactly how are we supposed to interrogate them? By asking them nicely, and if necessary, get a little angry? God forbid, we may even have to raise our voices and curse.