I think the concern is more along the lines of social integration than criminal hostility. Japan for instance has basically zero crime, and tons of tourists, but is notoriously impossible to ever become "Japanese" as an outsider.
I have to wonder who aspires to become Japanese or Chinese, or even the superficially plausible goal of me becoming German. It just wouldn't enter my mind.
As for social integration, the Chinese people I met seemed astonished and pleased that I could make any headway with the language or the food.
