Just because Gary Kurtz couldn't understand why Lucas wouldn't just have shot it with Greedo shooting first from the get go doesn't mean Lucas wasn't trying to have Greedo shoot first. According to Lucas he tried, and failed 3 times to get the squib shot right, so he tried making it clear that Greedo planned on killing him with the dialogue.

Nothing against Kurtz, but to me he isn't the final word on what goes on in Lucas' head.

As far as scripts and novels representing that Han shot while Greedo didn't, this thread is based on the fact that the novel in question here didn't make that clear.

I think Lucas probably heard from enough kids who thought Han was cool -because- they felt he had killed Greedo in cold blood, that he felt a moral obligation to make it clearer that he didn't.