You don't have to apologize to us I don't think.
I looked over you're other thread, and I'm not surprised you lost your cool. If it makes you feel better, I also seriously lost my cool the first time talking about this with someone. It was really, really bad. They kept cutting me off and not letting me finish my sentences and that's a real quick way to piss me off. It got real ugly.
I did call them and apologize for loosing my temper. Because I did disrespect that person.
But just remember, and this is just my opinion, but you SHOULD be angry. There's nothing wrong with you for being angry. They should be angry too, but their minds are like... Hypnotized. It'll all work out. It'll be okay.