brainwash (someone) with (something)
To intentionally alter someone's thoughts or beliefs by using a particular idea or method. Commercials brainwash us with subliminal messages that make us go out and buy stuff. The cult leader brainwashed his followers with increasingly distorted information.
brainwash someone with something
to drive specific knowledge or propaganda into someone's brain, by constant repetition and psychological conditioning. The dictator brainwashed his people with lie after lie. You have brainwashed yourself with your own propaganda.