I don't know what is wrong with Gordon Chang
I suspect it is Stockholm Syndrome and he does what his publisher wants to hear. This is not uncommon among East Coast born Chinese American, specially those with mixed ancestry. It is not uncommon for them to try to suppress their Chinese ancestry to gain acceptance with their American peers, Some like Gordon would go even further and be openly hostile to his Chinese ancestry to gain even greater acceptance, That's survival instinct for them.
This is still true today. People who are unable to suppress their Chinese identity are more likely to get bullied and passed up for promotions. See what happened to Private Danny Chen of Chinatown, NY.
Same with the Japanese units in US Army druing WWII. They were fighting in Europe mostly out of necessity to prove that they are loyal Americans, But all is good now with Japan and the Japanese. Today, the bigger threat to American Hegemony in Asia are the Chinese.