I feel like the Soviet leadership is needlessly wasting manpower on the Reich when it could be crushing rebels to deal then use full force in border war as whats the point in dealing with Nazis when you could lose authority in your own nation. Also see your point about Russia.
While what you say is very much the truth, we must remember that the Soviet leadership here isn't exactly
the brightest bunch on the Planet Earth if you want to be honest about it (especially Beria). The Central Asian nationalist rebels are largely seen as a afterthought by Irkutsk at this point in time; seeing as they haven't gotten strong enough to reach the point where they become the theoretical
uncontrollable threat that would be able to tear the Soviet Union apart by the ramshackle structure that is keeping it together at this point in time (
yet). The Red Army has also been relatively to a certain degree successful in limiting the overall territorial gains of these groups. Leaving the somewhat
delusional Soviet leadership in a bit of victory euphoria as they begin to buy their own bull-crap in the bucket loads and start to honestly believe that the Civil War will be over with any day now.
Through, if you want to be brutally honest. Rebels or not. The Nazis are always going to be top priority for the Russians no matter what. To pretty much every single Russian; The fact stands that Mother Russia isn't complete and whole until the "West" is reclaimed from the Germans, it is not whole until Stalingrad and the entire Eastern Front is avenged, it is not whole until the Nazi menace is destroyed
forever. It's a point of national pride for the Russians, one that they (understandably of course) can't and will not let go of until the mission has been completed, someway or somehow.