Different country, different rules. This is exactly what I'm talking about, it's very easy to apply the "I wouldn't" or "they shouldn't", but for that particular country it can be the norm, the locals know better than to screw with the gang members which are likely very easily identifiable. If you watch, before the dick who started it picks on them, he picks on what looks like a local guy in a black t-shirt, watch what he does... He walks away and avoids the confrontation, knowing full well what will happen if he rises to it.