Comment by post_below

I'll try it without citations :)

Because China is an authoritarian regime that imprisons, and sometimes kills, people for their opinions.

Because China systematically destroyed one of the oldest and most peaceful cultures the world has ever seen in Tibet.

Because China put 100's of 1000's of Muslims in concentration camps. A program which is still happening by all (non Chinese government) accounts.

And so on.

Not that Apple makes decisions based on moral considerations.