There are things that could heal the harm done to the Iraqi people, but that's a whole different thread.
The recency argument does work to counter Whataboutism, but we don't use it enough:
🇺🇸👴🏻You're 100% right. Slavery was wrong. Colonialism? Wrong. Undermining democracy? Wrong wrong wrong. Wrong when we did it. Wrong when anyone does it. Wrong even when we did it recently. We call it out wherever we see it. At home, we work to make our government make better decisions.