"Prejudice" means simply to prejudge. Usually it is negative, but it can just as easily be positive. When witlesses see other witlesses, for instance, they are often prejudiced to believe that those other witlesses are "friends". When Christians (including witlesses) see angels, they prejudge them as friends. When scam victims fall for a scam, they prejudge the scam (and the scammer) as being helpful.
And the Number One Prejudice is actually against Satan and his demons. Just about every Christian, Jew, and Muslim is programmed and prejudiced to believe that Satan and his demons are the epitome of evil. They don't even question it--not even from their own LIE-ble. (Would any sane person reading the account banning people from knowledge of good and evil believe that Jehovah is a friend?) The corollary to this is prejudging God as maximally benevolent--again, close to 100% of people in the above religions are thus prejudiced.
Then, once I began researching things objectively, I realized that Satan is a freedom fighter--Alex Jones deluxe. (In fact, Satan and his demons would make Alex Jones and Ron Paul look like tyrants by comparison.) Satan genuinely wants to help people--right in their own LIE-ble, at Genesis 3, Satan put it all on the line to help mankind escape Jehovah's tyranny. Not even 3 pages into the LIE-ble, and not even looking at other sources, and any objective person would realize that their hatred for Satan and love for God is based on prejudice.