First thing to work out is are Chinese alienating or are foreigners just alienated.
My primary experience of Chinese outside of China is only on planes. Years ago I had a night flight from Bangkok to Xi'an. Most of the passengers were some huge tour group finishing up their lady boy gawking and going home. The airline staff thoughtfully - or oddly - placed all the non-Chinese, about two rows of us, at the front of the plane. The rest of the plane acted like they were on a K train. It was hellish. (I had a beefy German next to me, and his leg pressed loving against mine for the entire flight, and every few minutes I had some passenger grabbing at my head rest on her way to the toilet.) Also, much delayed. The passengers insisted on standing in the aisle, swapping seats, having arguments about whose seat was whose. In short, all the usual boundary conventions people use to get through air travel were being ignored.
Second experience is recent. Early this year I flew to Australia via Singapore. Good flights, 7 hours per leg, nothing too horrible. But the difference between any one of the legs and the last one into China was kind of marked. Firstly, by the fact it was nearly empty. Secondly, by the fact that even then, seemed like the majority of the passengers found some way to be arseholes.
I don't know however that there's anything peculiar to the broadly western norms of travel that make them essential and real beyond the cultures that have grown them. If Chinese want to fly planes the same way they used to ride trains, why not? Air travel norms include a lot more staff actions regulating passengers, but so what? And if they want to close ranks when they get to some foreign destination, so what? It's unpleasant for the people around them, but what wouldn't be? A lot of travel really is unpleasant.
There is one idea that says Chinese as a culture do push boundaries until boundaries are enforced. This used sometimes to be heralded as their entrepreneurial spirit. These days it's more likely to be called bad behavior, but so what?