I still say write something about it. Focus that energy into doing something. With all due respect, some people do feel heated and more passionate about some things then others. That's not always a bad thing. Telling them to get over themselves isn't always the best advice. (not arguing with you at all Merry, just giving his view the proper credit too. After all it sucks to really feel passion for something and not have people understand...I feel that quite a bit, but not with martial arts.) People have a wide variety of personalities. I personally think that's a good thing. What is true, however, is that passion about something that never gets put to good use is a tragedy. If your anger about something makes you unable to function or retreat from normal life, etc. then I do think the "get over yourself" advice is the one to take.
Other then that, do something with your feelings. Express them in a creative way.
Ryu