It is not a threat, Inquisitor, it is a promise I have made to those who sought my help and protection. I have spoken at length with those who have already made their way to me. Most have no particular desire to remain in Tevinter. They wish to be free and they do not believe that will ever be possible there, no matter what happens. Previously many sought the Qun despite having misgivings about that course of action. They saw no other choice. It was the Qun or escape and live in abject poverty in the alienages, still subject to the cruelties and whims of the Shemlen, ever fearful that their masters would come after them. Or seek the Dalish and hope that they encountered one of the clans who actually welcomed outsiders.
I would see the human slaves freed as well but do not think that they would have the same difficulty in making a lace for themselves once free. They are human after all.