Earlier quoted context omitted.
That’s such a dumb comment. Back when the British was taking items back to the UK. There were no rules or systems in place for this stuff. You could buy it, trade it, steal it. It didn’t matter. And the UK isn’t the only country to ever do this. Laws were created to resolve/fix/prevent things happening. You can’t blame people for shit that happened before someone decided it’s wrong.
You can , however, blame them for refusing to return the shit they stole.
If you are on the losing side you might sometimes have to return things (see looted nazi stuff), but if you are on the winning side you probably won’t (see pretty much all of the Americas).