Why they look not for a quiet corner and pray there. Even the founder of Islam lived at least part of his life in the desert. Where was the prayer room there?
Do you know where their real problem is?
It is about status. There are qualified employes, which have certain privileges. Now some low qualified employees, even not employed by amazon itself but by a subcontractor ask for the same benefits.
Islam is like always only a mask to ask for benefits that someone obviously has no right to get.
If I would be in charge I would tell them that I have nothing to do with it. Then I would tell them directly if they don't do their work I will withdraw from the contract immedialty.
This is the way to deal with this issue. The most people are too weak.