That wouldn't be a massive generalisation or anything now, would it be?
It's what I feel. I read that all the time from interviews with gay celebrities and in the gay media. If someone admits they have had relationships with both genders, they are genuinely ridiculed by the gay press and the gay community whereas a lot of straight people say it doesn't matter who you sleep with and they don't care. If you are bisexual, it's like you've betrayed the gay community in some way. People can't accept shades of grey when it comes to sexuality. The gay community wants you to wave their flag.