So the guy panicked and bluffed during business negotiations that he wasn't really trained for - so what? Could happen to anyone under pressure and facing disappointment of an unexpectedly low offer. Jobs, supposedly an experienced business professional, could have just coldly smiled, Warren Buffet -style, and could have sent the rookie on his way with a 2/3 offer just to make a point and educate him. Instead, Jobs started calling the poor guy a liar in front of his co-founders, stormed out of the meeting and, in the end, screwed every single person in the entire startup by shamelessly copying their product. To me, it seems like behavior of a Yet Another (Proverbial) Silicon Valley Narcissistic A-hole (YAPSVNA).
Let's suppose the story was reversed. It was Steve Jobs who tried to deceive someone, and the negotiator on the other side detected it and called bullshit on it. Would you be arguing that Steve should have been given the benefit of the doubt and it wasn't a big deal?
Yeah, who would praise somebody so undeveloped emotionally? What a small, small man.
Then you read about how he treated his family and his employees - he was just a tiny thing of a human being. It's sad - like a self-contained parable about how to not live your life.