Kadyrov is a Chechen, not a Cossack.
I stand corrected, Kadryov is a Chechen dare I say in a sea of Cossaks? - Terek Cossaks, Volga Cossaks and Black Sea little doubt had extensive dealings with Chechens and Ingush during their mass deportations in the 1860’s. How much the Cossak war culture influenced the present day Chechen war and separatist culture would be an interesting study.