I think one thing that's slipped by in all this discussion is this:
She's challenging the Institution too soon.
If this was a college, she'd have a better chance of getting her club passed, so long as it didn't preach hate crimes. In HS, its all county-owned, county-run, we're-liable-for-these-dang-kids'-actions-because-they're-minors, type of flak that'll stifle her efforts. Once she gets past 18 years old and into a university, she can claim academic freedom and adult responsibilities. But at the HS level, it's gonna fail, simply because it'll reflect on the county and its politicians.