Yes (almost) everyone are prejudiced and intolerant about something. It's a bad thing only for the one that is intolerant. (Ok, yes the lack of tolerance of majority can affect a lot of lives). But if we take everyday little things where people tend to be prejudiced.. (say, you meet a new person and you are prejudiced about their clothes, you wouldn't dress like that under any circumstances) it's ones own freedom that is lost. A prejudiced person has so many limits for itself, so many "principles", so many "morals". And all this "good things" make a slave out of your understandings, and before you realize you despise half of the world because they are different, completely uninterested about the fact that DIFFERENCE DOESN'T BRING HARM to anyone.
And tolerance is a bad word for that matter. If you have to tolerate per se, than you do not understand or justify others people choices. You just tolerate, which means you do have that inner struggle in yourself because something is different over your choices. If there is understanding that what you do, and what other do is simply right, than tolerance is unnecessary "act".