A biphobic lesbian tries to explain the root of her prejudice against bisexual women and figure out how to deal with it:

Being a sociologist I know that smaller communities tend to be more policing of the boundaries of a collective sense of identity, and the performances thereof. Further, oppressed minorities tend to be defensive of anything perceived as 'other' inside their group as someone that could be working to undermine efforts, that doesn't really share the same oppressions.

And a lot of lesbians take this position. They argue that if bisexuals want to be part of the lesbian community, they need to take the community as lesbian, and that a woman that loves men or a man needs to deal with such. They argue that there is privilege in being partnered in a heterosexual relationship, however, queer the woman therein may be, and that such privilege is antithetical to the community. [...]

[While reading comments on blog post about bisexuality] I had to stop myself from posting something along the lines of "If you want bisexual representation, get your own fucking show, and leave us the fuck alone to have our one tiny niche. You find supposedly queer women fucking men all the time on network TV, what else do you want, to colonise our space too?!". It was this visceral reaction that scared the crap out of me. [...]

...aside from speaking up against [bigoted] speech, and validating the queer/gay identities of bisexual women, what else can I do? I have this prejudice in me that I detest, and I need to work on it to get rid of it.