I appreciate the sentiment but prejudice is a fairly complex state of mind to propose as the atomic root of all society’s ills.
Prejudice is always preceded by fear. What other reason is there to pre-judge that isn’t synonymous with fear?
And similarly, fear of people is always preceded by lack of knowledge, a lack of confidence in one’s ability to predict behavior, aka trust.
I only ask because solving prejudice is hard — ask 10 people how and you’ll have 10 different answers — whereas a problem like ignorance has only one solution.