Supervisors need to trained in communicating with the staff in a professional manner. If your staff is in a good mood the customers will notice it and will most likely shop there because they will think this company cares about its employees.
Lowes is a warehouse with home improvement merchandise. Most people who go there will need assistance. If they are greeted with a smiling face and a willingness to help the customer that customer will be back. If your employees are upset at their supervisor because he/she do not know how to talk without screaming or using profanity, this will affect their performance.
Also practicing bias treatment. will cause a division among the staff. Train these people. I shop in the store in Newburgh N.Y.
and I have seen how some of the supervisors behave.
This should be addressed.