"Angry" is far too strong a term. "Exasperated", maybe. Also, "most people" do not hate the books. Most people haven't read them. Their loss. Some are crap, but enough are good to make them worthwhile on the whole.
And I fail to see what's
-worthy about wiping out 90% of the established Star Wars timeline, events, and in some cases entire characters' lives on a whim, just because of the medium it was told in. Granted, something similar is happening with Trek right now, and I'm not up in arms about that; so maybe if there was a good reason for it I could be convinced.
Little things here and there are fine. If you can tell a better story by ignoring some minor point, go for it. I simply don't trust Lucas to be a good enough storyteller to make major sweeping changes worthwhile.
And I fail to see what's

Little things here and there are fine. If you can tell a better story by ignoring some minor point, go for it. I simply don't trust Lucas to be a good enough storyteller to make major sweeping changes worthwhile.