Sorry for the late reply.
Honestly? If they are willing to look down on someone just because they don't understand them, it says a lot about them as a person. For such people to understand, they need to be motivated and want to learn new things. No theory from an outsider can help... The only way to do that is to let them experience life. For some people, patience can help; but for people like this, they need to know that we won't stand by and accept their insults with a smile.