I believe this is due to communist forces being under siege since the beginning of the ideology. https://en.m.wikipedia.org/wiki/Siege_mentality https://en.m.w

I believe this is due to communist forces being under siege since the beginning of the ideology. https://en.m.wikipedia.org/wiki/Siege_mentality https://en.m.wikipedia.org/wiki/Siege_mentality See how other nations dealt with the Russian revolution, and subsequently. From CCP's perspective it has been surrounded by enemies from even before the founding of the PRC. Remember violence begets violence.