You have named the reasons that I made this post on FR.
Be wary. “Racism” is a Scarlet Letter; you must prove yourself innocent [probably you cannot] and your colleagues will likely abandon you, hoping it doesn’t happen to them next.
Such is the fruit of Obamanation.
The best thing to do, since any white person is guilty until proven innocent (which never happens, or can be revoked at the first instance of displeasing any black person), embrace it.