I am not suggesting for one moment that it is all your fault or the fault of Damo. I am suggesting, as have others before and since, that the society of which you are proud and that many of you regard as being in some way special, tends to be unique in ways that are unacceptable to the rest of the world and with that in mind you should not be surprised when that world objects to you trying to force your way of life on them.
I was here in June 1989. I and about a million others marched in protest. I designed large posters showing a world shedding tears. Every June 4th we remember with sadness the happenings in Tien an men square. You see, I live in Hong Kong. It is called Hong Kong Special Administrative Region (SAR) because it has its own laws, its own police, its own currency although under the 'watchful' eye of Beijing. However please dont just take my word for it, you can google hong Kong and see for yourself.
BTW the answer to your first point is No. we do not have small gangs of people who wish nothing more than to beat people up. It is an unknown western phenomenon.