Given the context, aka none, it is also possible that the hotel manager was denying them service because of their race, and someone complained about it. There's also the chance that the guy in this video isn't the actual manager in the first place.
With no context, anything is possible. 
More likely, there is a law that makes it so that people have to give up residences for refugees in the case of an emergency. In that case it's not really an infringement on rights but more of a 'broken law' scenario. Someone should take it up with the italian govt