I have a question.
How do you change an ingrained Ideology?
The best example would be either of fanatics who would kill for their beliefs, or rule-abiding OCD ones that would follow the same rule even if it is the end of the world.
While the latter is a mental disease and needs progressive treatment as such in curing that disease, the former one isn't that simple. It's something more akin to an ingrained theory, a firm stone line that was carved deep into their subconcious enough to leave a scar that could haunt them forever.
It is more dangerous than a normal disease, because it cannot be explained by normal conditions, nor can it be corrected by a therapy. And most of the time, the people themselves aren't aware of the fact that such a belief, on which their entire life was based, could be wrong.
So once again, let me ask you this.