Not really no. You can't use people defending themselves against an unjustified annulment as proof to justify it.
That's the same sort of ass-backwards logic Meredith employed which led to the situation in the first place.
Hell people in DAI all say that Meredith's RoA was unjustified. Cassandra, Cullen, etc.
Cullen was there, in fact.
Actually not once, not once was it labeled unjust by either of them.
Either in DAI or 2.
Also do you think the majority of the enchanters being corrupt is a baseless stance? Orsino being corrupt?
The rampant blood magic usage, The summoning of demons, again and again this corruption is proven and proven again.
Cullen holds resentment for not seeing through Meredith being driven mad by red lyrium, and apart from him questioning her on killing mages that surrendered offers nothing against the annulment.
Cassandra doesn't even offer that, she just regrets the inaction of her order allowed Anders to act and kick off the war.
She didn't dismiss Meredith's grounds.
That circle was a ****ing festering pit that needed to be purged.