i think its kind of hard to hate something you created yourself, and practically spent your whole life doing. If youve seen any of the countless stories about the making of star wars (particularly the first one), you would know lucas has quite a passion for it. Is he the greatest filmmaker in the world? No, and he admits that. But to say he hates his baby because he made some changes that not everyone likes is a bit of a stretch. The thing is, lucas created star wars himself, the whole universe is his brainchild; the way i see it, he can make whatever changes he wants. Its not like i went in there and screwed around with a classic movie, the actual creator went and added things that he thought would improve the stories and that would have been in the films originally had he had the opportunity to make them a certain way back in the 1970's. I mean, to say lucas hates star wars is like saying i hate cake because i put in an ingredient that i thought would taste better--sorry if nobody else likes it but its still my cake, and i want it to be as good as possible.
Point being, lucas doesnt hate star wars. And jkr doesnt hate hp. But this lucas vs jkr argument is operating on a bit of a double-standard.