Pfft.
Maybe one out of the odd thousand or so.
Andraste was a rebel. Although she did hit Tevinter hard, she like any invader before and after her was defeated at the gates of Minrathous, the oldest city on Thedas which remains unconquered after besieged by men, Quanri and the maker himself.
And there has been no rebellion this grand and worldwide since Andraste, This rebellion cannot be put down, the best case scenario is you'll secure some countries but some evidently will not submit. The Templar order is not what it used to be, people no longer trust them, they no longer have access to free Lyrium, they have to raid and pillage to get supplies or they will starve etc etc etc...
You are so sure of yourself its not even funny. These are ideals of a soldier and a grunt, not a strategic thinker. Joffrey from GoT also said kill them all, put them all down. These ideals gives birth to leaders such as Magneto and they have every right because they are putting survival before anything else as is their right.
Actually that would make my day, oh no my year. A rare mage that can manipulate Lyrium, throwing Templars around like trash.