Are we any worse than our straight counterparts? I don't think so. It's just more repugnant when we do it, because we should know better. After all, we're a group that is systematically discriminated against at all levels of society.
In our own lives we are aware of gross injustices and events that have happened to us, but we take the little injustices for granted. But just like major traumas in life, little incidents and ongoing conditions can affect us seriously, even insidiously.