I think the big problem in this discussion is that you keep referring to asexuality as an 'identity' whereas to most of us it's just that some people, who we know, who may be in our families, aren't sexually attracted to other people. It's no big deal.
I bet 'hate, prejudice and misunderstanding' is not against people who do not want to have sex; to the extent that it happens, I'm pretty sure it's against people claiming that a pretty unremarkable characteristic - not wanting to have sex - is 'an identity'.
I question the hate and prejudice - I can't imagine people caring all that much, in my experience of people who weren't sexually attracted to other people, there was so much more to them that this was just one aspect of them, and not a very unusual one.
I would be interested to know what examples of widespread 'corrective rape' of asexual people are taking place, the corrective rape [and sometimes murder] of lesbians in South Africa has been identified as a problem for the last quarter of a century or so, and there is solid, though undoubtedly incomplete, data on how widespread it is.