I think many INTPs find themselves outcasted and ostracised by most other people in real life without a conscious knowledge of MBTI.
At least the MBTI allows INTPs some degree of comfort and acceptance of who they are.
This makes since to me. I am new to this form but I just left another INTP forum site and I realized that a lot of the prejudice type INTPs are expressing almost a reverse prejudice because they are themselves very ostracized IRL. Just because they are traditionally loaners that spend a great deal of time in there own head and not relating to other people.
I think that many introverted types can become this way especially if they are only introverted because they are outcasts by the Extroverts of the world.
I have a theory that there are at least two different levels of Introverts.
On one hand you have the introverts that find solace and comfort in there personal time. These people have no real desire to be part of the group or being excepted they just want time to think and get away form all the noise. These are the true introverts and they a few.
On the Other hand you have the Outcasts/Abused or those who believe they have been Outcasts/Abused. These people either don't trust people or they find it painful to be around others who they believe they will hurt them in the end. These type of introvert has far more introverted than even the true introvert because they can't stand to be around other other people.
The problem is some of these Outcasts/Abused Introvert are actually naturally Extrovert people that no long can trust others enough to actually live there life naturally. This causes bitterness and pain. If you have a natural desire to be accepted and loved and you live your life as a outsider off ball you are never really going to be happy. Of course some times you find online sites that have open communication between introverts and than become an outlet for you to retaliate against all the types that outed you IRL.
I myself am of the first type of Introvert. I have no real want to embrace society. I like being on the outside so that I can see everyone else more clearly. I celebrate differences in people because this is what makes them interesting. I may generalize at times for convenice but I don't think of myself as superior to any other type. I feel no bitterness against the world that hasn't truly accepted me because I don't have a need to be accepted by the world. I some times wish I could find a job/career easier but that a different subject all together.
I am sure other functions besides the Introvert function may have something to do with this as well. S's generally don't see eye to eye with N's they have different world views. F's think T's are too anal and T's think F's are to emotional. My biggest pet peves is against J's I don't understand how they can try to simplify subject matter that is so complicated. They generally want the easy simple answer and few things can be answered in such a way. On, the other hand my wife who is a J thanks I am to flaky to survive in the world without her direction. The said truth is she maybe right.