Do you think Ronnys behaviour is justified keeping in mind the type of work hr does according to chapter5 of A passage to india by E.M Forster

No, Ronny's job does not excuse his bitterness or condescencion. He is a cruel man, and although he believes his authority calls for this type of behavior, Mrs Moore is correct in her assessment that he does NOT treat people with the Christian courtesy he's been taught. His behavior cannot be justified.