Why r bi and s people so discriminated by gays?

i have noticed recently that gay people say bi people are confused when i know they r not but yet straight people say that its their choice so its like straight people are okay with bis why not gay people is it wrong to love both es. gay people say they hav to pick a side... why is this some war cuz in the end straight win if u think about it they can survive and reproduce so i wouldnt fight it and instead get along. also why r people also like bis more discriminated than gays crossdressers trannies shemales and even s, who dont even get a choice are treated so bad by large majority of gays i see. Why cant we just get along with these ppl they r not different from u and me if they want to hav a different or love both es shouldnt they be a ble to without being discriminated by the majority of the gay community?