Does discrimination and bias promote dis-respectful communication? In my experience, the answer is mostly yes.
Humans are creatures of reaction. We are intimately setup to react to our environment because that is how our biology itself is set up. The unfortunate consequence of this is that dis-respectful communication more often than not promotes a reciprocity reaction in the recipient who will most likely respond with an elevated dis-respectful overture.
If someone wrongs us, its only fair that we wrong them back, right? ( Dan Ariely has an interesting spin on this, he says revenge activates the pleasure areas in the brain lol )
Anyway, what I just want to say quickly is that discrimination and bias have no place in science, dis-respectful communication is only provocative and intimidating, and such an environment antagonises logical reasoning, sound thinking, and scientific progress.
One should expect to enjoy a chaotic life if one embraces immaturity and cannot practice humility.