I’m glad you pointed out her errors. She took it very badly! Some people just can’t take criticism without seeing it as a personal attack. Also, the more you cover a subject, the easier it is to fall into a trap of believing you know everything about it.
On the other hand, I can’t imagine wanting to spend time with today’s students; since academia became entirely consumer-driven, respect and decorum have entirely vanished.
Personally, this is also the reason I’d never call myself an “ally”. Nobody will ever thank you for wasting your time on them, and in fact it’s far more likely to give you nothing but misery. Just smile, nod and wait for them to stop their nagging and move onto someone else.