Bad Judgement, or ...?

Again, when I want to do things right, it ended by making me feel like an idiot. And that action may -- or may not, I haven't found out yet -- cost us a few millions.

You see, because I just ask to the representative of the owner about a detail that our own supplier emphasized at not having it on their finished product, I got a short reply with a sharp tone like "Can't you even read?"

Crap.

My boss even asked me why did I even mention the difference because then we'd have to comply over that minor detail -- not to mention the implication of switching supplier and additional cost.

I should have follow my first idea about NOT TO ASK ANYTHING about that EFF-ING MINOR DETAIL!!!!

Right now I just felt like crawling under my desk and wait for the doomsday to come.

How could I be better at judging things?