If everyone here on this board was free to leave and just express themselves then there would be no bitterness as you mention. When you have your family taken from you and are either forced to not talk about your feelings or talk and then lose everyone you know then I would imagine its natural to be upset about that. So yeah, there is bitterness and sadness and some negativity. Because this board is our outlet. it is the only place we can argue or talk.
Although I argue with christian fundamentalists on here often, I hold no ill will for them. I cherish my freedom to speak my mind on here without reprisals or losing my whole life just because I disagree and state it.
It is human nature to feel hurt when bullied and abused... I am surprised you find that so hard to understand.