Every empire suffers from hubris, arrogance and condescension, and therefore a moral blindness. That's true of the American empire, it was true of the British Empireearlier, and it will certainly be true of the Chinese Empire in the future.
I still have a righteous indignation at injustice, no matter what form it takes. It could be homophobia, it could be white supremacy, male supremacy, imperial arrogance, class subordination or whatever.