everyone needs to forgive zuko now, he SAVED the WORLD remember?
have you all forgotten the epic episode called "the blue spirit"? if zuko had not saved aang in the episode (albeit for selfish reasons BUT STILL), the war would have been over as we know it. so if zuko failed at that, we would not even have had a season two. forgive him already. ive mentioned this before, and i'll say it again. concerning his "betrayal", he only had like what a couple days at most to get used to his new self, (personally, i hated his new attitude, he was too much of a goody goody, it was so... uncharacteristic, but it was intentional im betting) and when he had to make this critical decision, the situation favored aligning w/ azula. i mean, zuko had azula on his side, AND the DAI LI, vs aang and katara. he was THIS CLOSE to finally getting the avatar. it would have been irrational to throw away your entire life's ambition when the outcome was heavily in your favor.
again, zuko saved the world in the blue spirit remember? he'll probably redeem himself eventually, but ppl shudnt be hating in the first place. if u wanna hate anyone hate azula