should people be allowed to self identify their ethnicity? ?

As long as they're not using a false ethnicity to game the system I don't care how they self identify.

You are who your parents are.

Sure,

Ťhėrė ârė dozens of ethnicity choices &
prbably an ♾ more to invnt on yur own
but skin color + race is pretty well set in
sťônė !! !
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........

I'm speaking for billions when I tell you this:

If you do not even speak my native language, you cannot claim my ethnicity.

(your skincolour or other genetics are irrelevant)

I am a redwood picnic table ..................................

No, because it becomes a huge problem when it comes to organ donation.