Chiang was never a Commie. He was the anti-Commie.
I recall in one of Scott’s books he mentions that while we were openly supporting Chiang, and probably most Americans were also supporting him totally, there was a significant group who were sabotaging him.
He tells of flying transports filled with desks, and junk like that to Chennault when they needed and were asking for fuel, ammo, parts etc.
Scott also mentioned Mao being able to cancel attacks they were making against the Japanese because he didn’t want the bridges damaged as it would help him against Chiang.