Don't worry about diligent.
He does NOT know how to put forward a counter argument.
His go-to defence is ad hominem.
He is stuck in a time-warp of the 1950s and 1960s; of McCarthyism.
Any way, you get used to it, after awhile. Just like old furniture.
Btw, your knowledge of Sg (Lee Kuan Yew) and Chinese (Deng Xiaoping) is very impressive.
