The Resistance would never trust her again. Not that they had already. Besides few people knowing that she was receiving lessons from the wizard, it looked bad. He was attacked, Death Eaters arrived, and she disappeared. It wouldn't take much of a stretch of the imagination to believe she'd orchestrated the whole ordeal. After many, many years of eluding the Dark Lord, she'd been able to deliver Dumbledore right into his hands. She wouldn't blame anyone for thinking she'd done it on purpose.