wonderdummy
asked:
The changelings that infiltrated Canterlot for the wedding shenanigans had been brainwashed to believe they were actually doing Equestria a great service. Reading their minds would have revealed the mantra used to brainwash them. "We have control. We keep you safe. We are your hope."

Interesting way to look at it.
Chrysalis had her reasons for attacking Canterlot, beyond her own lust for power and conquest.  She had effectively erased the minds of those who followed her as well, stripping them of their sense of self.