You're acting like its my fault or my Inquisitor's fault they were placed in that situation. I didn't oppress them, I didn't force them to break away illegally from the Chantry, I didn't make them sign an agreement with Tevinter, and nobody was forcing them to actually do it. If they didn't like the terms, they could just have left. Nobody present has the resources to track them down - the Venatori would simply take whoever decided to stay. Slavery is part of how the Imperium works, and its a society that has persisted for centuries. If that's the system the Mages want to enter into, they can't complain about the rules not suiting them.
They have made some spectacularly bad choices. The whole vote was illegal in the first place, seeing as the Chantry and Templars were not consulted and did not agree to abide by its result. The motion was carried by a slim majority, yet they forced everyone to abide by it and entered into a crazy mass walkout, when they had no lands, no allies and only a small number of people with even rudimentary warfare skills. Most Circle inhabitants would be finding it hard enough simply to adjust to life outside the Chantry, without the added pressure of being homeless, friendless and hunted.
Its isn't my fault that they made such stupid choices, and they could still back down from this at any time. Either by leaving Redcliffe or more sensibly suing for peace. Which would require the Templars to be receptive to this, making it another good idea to get them back to the negotiating table. The Mages have no supporters because as Vivienene points out, their actions have made it impossible for anyone to view them favorably, They have caused upheaval, confirmed people's suspicions about Mages being troublesome, and made themselves into criminals. Anyone who sided with them would be tarred with that brush, and would constitute a clear political statement - even if all they wanted to do was help people in need of shelter etc as Alistair tries to. And as he finds out, good intentions are all well and good but the realities of having this rogue movement in your lands is profound and ultimately not worth the cost.
They made every bad choice themselves, they made the absolute worst choices in every instance and their actions have on many occasions been criminal. So no, I don't feel bad for not supporting them. I'm with Vivienne in thinking that the thing you should be feeling sorry about is that they were so foolish as to choose this course of action in the first place.They brought it on themselves, and yes there are many who didn't want this. But their excuses in Redcliffe of 'Oh, I felt I should just go with the flow...' Well, need I say more?