I find "whataboutism is not an argument" is a knee-jerk conditioned reaction against putting things in perspective.

It's almost a Pavlovian thought-stopping response by now - "sure, we have faults but we know them already, can we now concentrate on treating the enemy as some unique evil again?".

No, it's “uniqueness isn't the argument, stop beating that strawman”.

China is uniquely fixated on here on HN, there's a thread every few days painting them as a unique threat.

I would say that's all accurate and correctly characterized. Ofc, it's easy to paint something that's already a finished work.

What about all the other logical fallacies? I think we should address many other logical fallacies before having a conversation about whataboutism.

That wasn't whataboutism. There isn't any arguments there also. It was simply pointing out that if this man's torture is being added to your karma if you buy anything chines then that would mean that buying anything US made would add all those mentioned things to your karma.