Please remember: no matter how bad things get in your life/surroundings, there's no excuse to emotionally/physically/psychologically/verbally attack another person.
1. Lift fingers from keyboard.
2. Push chair away from desk.
3. Go find a calming activity for 20 mins or until you no longer feel angry, whichever comes last.
4. Return to computer; see if you can resume at a more reasonable level of discussion.
5. Repeat steps 1-4 as necessary.
I've been there. It's a bad place.