this argument highlights another flaw, the "common morality" would be anything necessary to literal day to day surviving and can't get you anywhere in terms of what is good or bad, even if whites for sake of argument were actually superior in a really complex difficult way to understand, let's just grant they don't have any enemies, you could never object to whites doing heinous things like hedonism, incest, necrophilia, scat porn, vore porn etc. this argument for morality gets you nowhere because what is necessary for survival is ever changing and can't object to doing "arbitrary" things, also under group survival there would be nothing wrong with a small minority of whites to enslave a mass of their own kind, it would enhance a new groups ability to survive and you couldn't object to it because group based survival can be reduced to any level of a taxonomical hierarchy.  any virtues outside necessary survival for a group would ultimately be pointless.
Australia