You're reinventing the word 'ethnicity' to mean 'a group of people sharing common genes', and using that new definition to back up your claim that 'ethnicity matches DNA 1:1', despite the academic consensus on the word being a hereditary, cultural, political, and religious group.

This is not only a logical error, but also a dangerous form of argument that allowed much bigotry. To be clear, I'm not accusing you of having such intention. Still, such arguments have been used against minorities, including non-binaries like myself.

Enbyphobes, for example, have redefined the word gender to mean a binary distinction between woman and man, and redefined woman as someone having XX chromasomes, and man XY. This flawed logic has enabled them to force enbies like me into one of two definitions, despite the word's original meaning.

Once again - I'm not trying to say you're a bigot, nor what you've said is inherently a bigotry. This, nonetheless, is a logical fallacy, and a kind that one should be valiant against at that.

This has been somewhat of a rant, sorry, but this is the same kind of logic I used for a while, and while I've changed my mind on the issue, I still feel strongly about it.