Why all the hate for biual men?

Ive recently come out as a heteroflexible . I was reading through the glbt section here on yahoo answers and the overall majority of responses has me starting to think no girl will accept me because Im bi. Im monogamous and the only std I ever got was from my female ex fiancee who lied to me about being clean and insisted we have unprotected . I date/sleep with one person at a time. Ive never slept with another man, but am positive I would if cirstances permitted. Yet reading on here, Im supposely greedy ually, a walking petri dish for hiv, and somehow evil and/or immoral for being honest about who I am. What gives?