What is that standard in the liberal world?
For Progressives, the moral standard is this:
That with advances the Progressive agenda is moral.
That which impedes the Progressive agenda is immoral.
Specificts of the Progressive agenda change over time. The only certain and lasting Progressive value is political power.
So the Progressive moral imperative translates to:
That which increases our political power is moral; that which impedes or decreases our political power is immoral.
What it comes down to -- and libs will never admit -- is that right and wrong are whatever THEY (and they alone) say they are. And if Tuesday's definition contradicts Monday's, that's okay.
How you build a civilization based on such shifting ground is a mystery. But then again, liberalism has never been known to actually create anything but anguish, despair, and misery.