All of Tevinter massacered the faithful during and after the First Blight, because they blamed the Old Gods for what had happened. Tevinter has in general had a strong dragon motiff in their architecture and culture, but that does not equal reverence of the Old Gods. It just means that they were too marvelous buildings to simply tear down. Our world is fileld with stories of how buildings dedicated to other faiths have been spared and repurposed, same is probably true in Tevinter.
And the are no "chains" from the Chantry in Tevinter. So there is nothing to "break". The Magisters are in full control of the Imperium, and while the Chantry there is influential (and part of the magisterium aswell), they do NOT hold any lordship over the mages.
And Magisters may be powerful, but they are not so powerful, nor are they so stupid, that they think that they can accomplish anything without the common man. The Magisters still need to have the favor of the commoners, otherwise another Magister will simply acquire it, and dethrone his rivals with his gained popularity amongst the masses.
I have never heard about mages massacring the Magisters. First Blight was most probably a unique event that could weaken the fade and cut mages-or certain mages from power. Judging by what happend to Corypheus, the mightiest could have gone lost. I thought that they were blaming magisters, not the Old Gods. They have not even scrapped dragon imagery. In fact Dorian wears an image of dragon on his armour. If the dragons were so much horrible to them as you say, why haven't they banned the use of this symbole. We know about Old Gods temples becoming mages towers. Looks like a laugh at chantry to me, considering dragon graphics.
Oh, but they are very much chained to the south, not by the Divines but by the faith. While under different leaders, with different doctrines, they share almost the same faith. I don't think that South would like to hear about Old Gods being revered again. Looks like a good pretext for war.
It is quite easy to sway the masses. One year and most of Tevinter would praise the Old Gods, a little bit of miracles and goods and common folk are going to dance with dragon like hats. At this point they must be immensely powerful if they have regained political power. It is a new age.
By the way, is it not 'support thread'. you don't seem to be interested in the 'support' part.
Knock-knock citizens of Tevinter Imperium, keep integrity of your thread and protect it from shaming hijacks. If it is not 'support' then make it go.