The Lisa incident was pretty much the lowest point for Jobs, in terms of him being an asshole. It's often brought up as an example of how horrible he was. However, he was young when it happened, he later regretted it and he did mature over the years (some people say that when he was fired from Apple, that was what fixed him) so it doesn't feel particularly fair to use it to characterise him later in life. That said, there were more recent incidents showing him to be a bit of an ass too.