So far, nobody questioned my arguments. Which means they are correct.
How can one question an argument, when the definition for one of the main subjects is not correct?
What the hell is a Cossack?
In Russia we have many more "Cossacks" than they have in all of Ukraine and Poland combined. We had Don Cossacks, Kuban Cossacks, Terek Cossacks, Yaik Cossacks, and a dozen other flavors.
Today they enjoy dressing up like clowns, playing with sabers, and talking at length about defending "traditional values". Of course, I would prefer that they instead defend the "traditional value" of working for a living.
Open Wikipedia and see what a Cossack is. Where the word comes from. How they understood themselves. What results DNA tests have yielded in modern times.
You will see that a Cossack is an amorphous thing. Criminals, runaway serfs, Tatar outcasts, bankrupted nobles, and everyone in between.