As can be seen from the above pictures, urgency is a universal problem not restricted to any race, creed, nation or socioeconomic stratum.
When you need to go urgently and there are no facilities, you need to go, unless you want to wet your own pants for the rest of the day.
Personally I have never done it after age three, but I can surely understand why this is such a common issue.
Just look at these white women doing the thing.
I don't think they are doing it just to offend you and me -- they are humans just like anyone else.
So it would not be fair for a country like Sweden to point its collective finger at Chinese nationals on this practice -- the question on everyone's mind would be whether you can be sure Swedish citizens don't do this abroad even if they can't find a toilet and they really really need to go.
Of course we can say that you need to finish your relief business before leaving your house, but I really wouldn't go there if I were you. There really are instances of involuntary spillage beyond one's control from what I have observed over the years.
As to the issue of forgiveness, we need to know what has caused the abrupt attitudinal reversal.
At this late date all the food, all the soup, all the salads and all the desserts of public opinion have been consumed; the feast has ended and the guests have left.
And you want us to discuss whether to forgive them for making a mess of the place?
An investigation and a formal apology should be issued at the government level and monetary compensation should be offered as punitive damages to the three tourists before any thought of forgiveness could even be entertained.
Or else this kind of behavior will become acceptable if all you need to do is an oral apology.
In order to fend off repetitious insults, bygones can only be treated as bygones when the main contradictions have been recognized and solved, and this has nothing to do with the issue of magnanimity.
This case will be remembered for its absurdity even after humanity has populated one of Jupiter's moons.