We generally will look a lot further into the details of the case if it involved countries with abhorrent human rights records like some you mentioned. While Uzbekistan and Kazhakstan do indeed have bad records of the way they treat some of their citizens we have never accepted asylum claims from them in the first place and there are few direct flights between the nations so they're generally sent to the last POE if they try seek refuge and are rejected so anyone who is going back there is usually for a criminal/civil immigration violation, so little likelyhood of any repurcussions on return.