I see a lot of projection and assumptions there. No, the girls were not bisexual. No, it's not due to the area, and the area wasn't the states. No, it wasn't just a hug.
You're also wrong when you compare it to guys. Both men and women are far more likely to accept physical contact with a woman and reject it with a man. There's even studies about that.
In short, don't try to force your ideas on others, or to act as if everyone is like you. There's plenty of girls who kissed a girl, deal with it.