Agreed - I don’t think this was a racist action either.
I DO think the customer was treated improperly.
Was firing the employees overkill? Maybe? I’m leaning towards justified - but I would’ve based it on poor service and making the establishment look bad - not on racism.
I wouldn’t have done it unless it was something really gross, or if the store had an official policy governing what they should do about stragglers and it was obviously violated. And in the latter case there would be warnings first. Goodwill carries on.