It's for the good of the elves. And if you don't support her, you're racist. (And self-hating, if you're an elf.)
Well... that really depends on your impression of her. Seriously, she can be seen as power-crazy b*tch with little grasp on reality - that's precisely the kind of person you DON'T want to see with power trying to help her (and your) oppressed people.
I did help her (reuniting with Celene) and I really believe her playing blackmailer-puppeteer with figurehead Gaspard is a terrible thing for the elves in the long run. That is, realistically looking at situation, I don't thing Bioware would dare to reference anywhere true (inevitable) results. Celene's Briala-inspired reforms won't be as daring and she's likely to go back on them, but I believe some of it will remain, making life of orlesian elves a little more bearable. With Gaspard it's a matter of time before it all just backfires terribly.