It is callous and calculated, as former British intelligence officer Alastair Crooke points out: 'They in fact in some ways copy Genghis Khan and the Mongol approach to military conquest.
正如前英国情报官员Alastair Crooke指出的那样，这是冷酷和计算的："事实上，在某些方面，他们模仿了成吉思汗和蒙古的军事征服方式。