"It's human nature to give more attention to injustices they can see in their own community or that affect them directly."
This is the part of your argument that caves in at its base. Your argument: we're all hypocrites, and the NBA players are merely focusing on what is directly in front of their eyes. They can't be cognizant of every issue.
This is only a fair point if one were to assume that the league that has US racial injustice on their radar because they're "directly affected" likewise is not "directly affected" by the $5 billion dollars it makes from China annually.
I get not being able to speak up on behalf of every humans rights issue in the world. I also get the idea of only being affected by that which is pertinent to a given community or individual. But your argument lacks credibility by making a case that China is not directly on the NBA's radar and is not "directly affected" by China. It is. More so than any other country outside of the US. You're attempting to make China look like just another country, with it's own version of injustice that is "run-of-the-mill" when placed on the global scale, and that argument is fallacious at its core. When placed against your argument, China should matter more to the NBA because it "directly affects" the NBA to the tune of $5 billion. Does Pakistan have the same "direct effect?" Does North Korea, or Venezuela, or Iran?
The fact that hardly anyone in the league makes any sort of statement about that, while pointing out injustice (perceived or actual) in our nation is precisely the point where they lose all credibility in their arguments. Both are pertinent to the NBA. Massively so. Additionally, the fact that you evoked the cliched and trite Fox News and the lEtTer arguments into the discussion is also very telling about your outlook toward those who disagree with you.
