You do know those "white" emojis are actually the color of the average Japanese based on the way they draw themselves...Um...the default emojis are yellow or white. that's not what I consider free of "racial influence"
As for yellow, it's because they used the standard yellow smile face as the base. Yellow because it meant happy.
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What? Only the yellow ones are race-free. For the others, to paraphrase Henry Ford... currently you can have any race you want with emojis as long as it's white.
What Apple did here was rather brilliant. Think about this, the system is fully backwards compatible. The receiver will still see the emoji pallet based on their system, but if they're current on iOS or OS X, they'll see the updated emojis. Plus, they've done this without adding clutter. The UI presents them as modifiers to existing emojis, not as new individual emojis.
Those emojis are not "white". They are the color of the average Japanese. No Caucasian was used as the base for them.