I think you're overlooking a few things here.
First, the family arrived in the early AM. Where do you expect them to go, in the middle of the night, in a foreign country, with two elderly parents? Unexpected things can happen to all of us when traveling, and one would expect that the hostel would try to offer some help based on common decency alone. Sure, I can understand if the hostel doesn't want anyone sleeping in the lobby, but why could they not have offered some alternatives? Even if they were completely booked, couldn't they have offered a staff room? An office? A lunch room?
Second, just because Swedish police in general has a good reputation does not mean there won't be bad incidents. At the very least, they should have offered medical assistance. Why drive them to a cemetary when they could just as easily have taken them to a hospital? I don't know how they do things in Sweden, but here in Canada, even violent criminals get taken to the hospital if they appear to have health issues.
I definitely understand and sympathise because it is easy to screw up a plan or forget altogether. They did not plan appropriately or maybe the problem was with transport (in which case the agency should usually fix things by offering free accommodation or use airport hotel). They may have asked for understanding and support in a civilised manner but received no kindness from the staff. We don't really know how any of that happened though so it would be a bit unfair to assume they acted appropriately and did not behave in a disruptive way that would force the staff to call police. If they didn't, then the harsh judgement on the hotel staff is entirely warranted. But that's still an if at this point. We can't reasonably expect everything to go our way even if we behave well and ask nicely. Particularly true for us because most of the world have been indoctrinated to absolutely despise Chinese no matter the facts or circumstances for empathy.
We have to live with it. If they were treated poorly because of their nationality, it really does not surprise me. We've ALL been there many times. Just don't visit western nations would be my advice. I'm not sure why any Chinese person feels inclined to spend hard earned money in overpriced West. The experiences to be had are overrated and learning about places and history can be done literally anywhere with an internet connection. Some of us born and raised here must deal with it because there is no realistic alternative. These holidays are too often romanticised and if you were a teen or young adult, I get it. Life's a more extreme adventure of discovery. If you're old and want to see the glory of Europe or just want to experience and learn in person, go with the knowledge that you are not liked and behind the forced smiles, the deal is you pay up and eff off as quickly as possible. So knowing that truth, why go? Sure there are truly kind and intelligent specimens everywhere but they are an extreme minority even in the highly educated west.
Work hard to improve own nation and ignore the rest. They owe us no compassion and in return they deserve none from us. Don't stoop to hating, just treat others with indifference. Asians have for the most part, treated westerners with dignity and respect because they are bringing tourism dollars and other positive outcomes, Asians spending money there is considered a threat somehow and they don't even like it! Australians are angry that Chinese are purchasing Australian produced milk powder. The manufacturers and suppliers have dealt with increased demand but the population finds that as a reason to hate Chinese. That's the extent of the cognitive dissonance. It's been proven again and again that we will be hated no matter what and for right or wrong reasons. That's the power of western propaganda and brainwashing. So even if this incident is 100% true from the Chinese guy's recount, it should be hardly a surprise when Chinese people are being racially targeted for violent attacks around the western world. Maybe it's because there's more and more of us becoming citizens, permanent residents, and tourists. Getting wealthier relative to where western people are.
Someone's previous post asked why the world is the way it is, that's because evil things are allowed to happen and most people are too selfishly motivated to care about right and wrong. Old Christian teachings like love thy neighbour is well and truly dead in most of the West and didn't really work at any point regardless. Bitter truth is we're pretty nasty things and so any feigned kindness you experience in life is usually still motivated by some selfish desire. People have forgotten how to
think properly.