You did not say "etymology" specifically but you were discussing the meaning of a word and the definition of "etymology" is:
the study of the origin of words and the way in which their meanings have changed throughout history.
Pretty sure that's what you were talking about in your original comment. Just because you're discussing current etymological trends of the term "genocide" doesn't make it any less an argument based on etymology.
Also, I'm gonna go ahead and say that your point about genocide not being "wrong at all" technically speaking, is pretty ridiculous:
Generally speaking, genocide does not necessarily mean the immediate destruction of a nation, except when accomplished by mass killings of all members of a nation. It is intended rather to signify a coordinated plan of different actions aimed at the destruction of essential foundations of the life of national groups, with the aim of annihilating the groups themselves. [Lemkin]
How would one go about that peacefully?