"he shouted loudly." Some languages have an idiom for this like the English idiom "he shouted at the top of his lungs." (See: [[rc://en/ta/man/translate/figs-idiom]])
This could be translated as "What do we have in common?" or "We have nothing to do with you!" It is a belligerent response that means "You have no right to bother us!" (See: [[rc://en/ta/man/translate/figs-idiom]])