Ok. I already know exactly how this is gonna get taken, But I will try to do it anyway and see if I can get through it retaining the understanding it is not my personal opinion.
From the perspective of the overall general populous, Some see it as bisexuals do not exist on the basis, if you are a guy, once you engage in gay activity, it becomes more like breaking the plane in football and you are scored as being gay.
Now... that is indeed a glib interpretation of it. However...
From a psychological study standpoint, the position can be held that there is essentially no need for sexuality in this sense, and the only practical ones become in essence binary. On/off, Gay/Straight. However In this context it affirms there is no need for deviated sexualities because your sexuality is whatever you are in at the moment. This means looks as sexuality in the moment, as opposed to it being a character trait to have the whole of the individual identified with.
There IS logical reason for this. Sexuality while may be essentially wrote in stone for some, in many cases does in fact evolve as the individual evolves. That variable nature makes the concept of identifying with ones sexuality impractical and in essence lacking. In looking at sexuality in this form, it also helps to eliminate the concepts of divides that we all know all too well that people on ALL sides of sexuality use to separate from non like minded individuals. This view would in essence look at sexuality more as one Universal sexuality, or just... Sexuality.
So I can see where some people would think in that glib manner expressed in the beginning. I can also see where trying to remove dividing points from sexuality is actually a good idea and somewhat progressive and forward thinking.
It reminds me of the old saying regarding womens rights. To paraphrase, Women will never be equal as long as they take pride of being the first woman to do this, or the first woman to do that. The goal has to be not to be the first woman... But to be the first.
So yeah... While there well may be some hate/intolerance driving it, simple fact is, not all of it is and when you think about it and broaden your perspectives, you might see merit in it too, when it is used properly.
Please dont quote me to death like I were a baby seal beggin for a good clubbin
/raises flame shield.