Let me put it like this: When the plantation owners refused to let slaves leave them, was it "genocide" for guys in Maine to march down to the South and kill off the plantation owners wholesale until the slaves were freed?
Ah, but you are conflating -- hence confusing -- two entirely different circumstances:
1) People trying to escape you.
2) People trying to expel people like you from their territory, once they have escaped you supremacist government.
It is in your nature, as a parasite, to conflate these two circumstances because it is in your nature, as a parasite to confuse perception. Without confused perception you would not be able to continue to sap the life out of your victims.
In the circumstance when people are trying to escape you and you are using every trick in the book, including confusing use of words, to prevent them from doing so, you forfeit your rights as a human. You are a force of nature and will be treated accordingly.
In the circumstance when people have successfully seceded, along with enough territory that they are not de facto refugees, the subsequent assortative migrations have relocation expenses that must be borne by the governments from which people are trying to escape. That means when determining the territory to secede, the secessionists and the accessionists should carefully consider the relocation expenses for which they will be liable.
That means if you get stuck among the secessionists, they would have to not only provide fair market value for your properties that you cannot relocate, but they must provide moving expenses for your properties that you can relocate. The flip side of that is that the defeated accessionist government would have to provide similar compensations for those relocating to the ceded territory.
Of course, if, during the struggle to free themselves from you -- circumstance #1 --you persisted in your supremacist work, you would be treated as a force of nature and quite possibly killed without a moment's remorse.