No, I just think it's fairly close minded to assume that everyone thinks the way you do. I already said, most people are ignorant of bisexuality. I had heard about it, but never gave it much though prior to dating my boyfriend because it wasn't relevant to my interests. Was I ignorant? Sure. Did I hate bisexual people because of my ignorance? No. But dating him opened up my world a little bit. But it was because he was calm and confident about his sexuality. He said I could ask him any questions I wanted about it and he wouldn't be offended. We ended up having a really great conversation that night and I ended up dating him for 2 months.

I think that the OP is bullshitting about being confident in their sexuality. Confident people wouldn't get mad or frustrated, they would just state it simply to people that they are bi, not making a fuss about it. It is unfortunate, but understandable that OP's boyfriend was shocked. I never would have known my bf was bi and what his preferences were (i.e. how many guys he dated, what he was into, etc.) if he hadn't told me. And we were cool after that.

FYI OP: If you want people to be less ignorant then you should educate them in a non-confrontational way. Just tell people and whatever happens, happens. Don't be afraid of how people will react.