I prefer the term realist.
We tend to refer to those groups or cultures which we don't agree with as being ones which brainwash their followers. Aside from the details, how is what the Catholic Church, or the Protestant Churches, or Islam, or Judaism, or any of the dozens of other mainstream religions, different from what Charles Manson, or David Koresh, or any other cult does. They teach their followers what they want them to know, get them to start the children out as soon as possible, before they can become contaminated by another religion, and teach their people that their's is the only true way to salvation. Call it what you will, it's still brainwashing.