depends how deep into the ideology they are. Open minded people that can have discussions without turning to anger are your best bet. You are essentially asking a person to rethink their entire ideology. A quick easy way to start injecting these ideas into the mass consciousness is through the art of memetics. I know it sounds ridiculous but people don't understand the true power of memes effects on the psyche. A piece of information can be made into a quickly digestible nugget of Truth that plants a seed of doubt into the mind of someone who is totally asleep. You get enough of these red pill seedlings and eventually it turns into a snowball effect.