What you're saying is that anyone who compares anything to the wumao party is incapable of telling the difference between the two. That drawing parallels between it and something else is automatically racist.
I do not see any evidence to suggest that seanmcdirmid can't tell the difference between Singaporean and Chinese. My parsing of the post reads that he's comparing the behavior of Singapore-apologists to that of the wumao party. This seems uncharitable for sure, but racist is a stretch.
Honestly, it seems like you're jumping at shadows here. As an Asian, who cannot speak for any other Asian except myself, who has been subject to a hell of a lot of racism in my life, I simply don't see it here, and I see unsubstantiated accusations of racism as having a chilling effect on the conversation and making reasonable (if somewhat unkind) commentary verboten.