…but Green Arrow is standing right there, looking smug and superior,
and GA has spent the bulk of his career, both before and after that moment, concerning himself with white-on-white crime. GL's heroism is largely impersonal -- he protects against threats to life in general -- while GA acts on a far more personal basis, picking and choosing what to concern himself with on a human scale, and he almost always chooses to save white people from white criminals.
If anyone needs that lecture, it's GA. And Batman. And all the other
street-level heroes who make the streets safe for white people, while GL and his ilk make the galaxy safe for all people.