I don't know. The Order would give him a better chance at being able to keep them safe than trusting that Voldemort would, even if he gave him all our heads on a platter.

And Hermione, he was the one who told me I ought to free you. I mean, I'd been thinking about it before he said it, but he told me that if it was his to give, that's what he'd give you. I don't think he'd go back after all this and be able to think that way.