I do not consider racism is the accurate description about few banks. Would rather call it ego or superiority. Such banks consider themselves doing you a favour if you are their customer.
Besides, most is not all banks tend to just dump their staff at the front desk without any training. So it is a matter of ignorance and lack of professionalism.
Personally I deal with CBQ. In general am satisfied. Certain funny instances happen but in general if I have to change my bank, I would select CBQ. BTW, I rarely visit the bank for parking considerations and to be honest, am a privilaged customer.