How did you deprogram self-hating white people?
Depends on a thousand factors with the person, and how skilled you are at empathetic abilities. To start, ask questions and listen. Liberals spend much time thinking about what they decided you believe and very little on what they believe. If you give a fool enough rope, he may not hang himself, but he'll tie it around his neck and get on the stool, you just have to kick it down now. Talking to them about what you think first is pointless, they'll keep not taking any real stance on any issue so they can just attack you. In that circumstance, the only way to turn it around and get them to ask questions about themselves is humor, Rav Kahane ZT"L was the master of masters of this. But in this case, girl with pierced everything and all black weird clothes and funky hair, full package, starts screaming in class what about Balestine. 30 minutes with her, supports Israel, a few nights, likes white people again and is interested in conservatism. Lost track of her, but if I talked to her 15 minutes a day for a few months I'd keep her growing.
If you want like an attack plan for a specific person I need as much detail as possible so I can tell them who is brainwashing them, why, the effects of what they want, and what the right way is in a way they won't resist.