>>17013833
It's in the link you posted you silly billy

>>17013838
You don't understand what etymology is.

>>17013849
It's the study of word origins and evolution over time.
As your link spells out:
>apo-
Meaning "away from"
>semite
Jews
>-ism
State of being or thought
Staying away from Jews.

As your link also notes, it's a play on the word "aposematism" which is
>apo-
>semat
Meaning "sign"
>-ism
A sign to stay away.

>>17013833
I suspect "aposemitic" is only used in contrast to the much more common "antisemitic". Its etymology is basically that of "antisemitic", with an ad-hoc substitution of the prefix. You're unlikely to find a serious etymology for such an uncommon and contingent word. I think it's more accurate to think of it repeatedly branching off from "antisemitic" as needed, rather than having its own continuous etymology.