1940 is the date Goebbels reported

All of these were verified by the Red Cross and there are stacks of documents giving evidence and testimony to the contrary. But yes, I suppose if you throw out everything you don't like then any argument will get flimsy. Certainly we don't get "genuine analysis" as you put it.

Further, again, the Soviet weaponry did not fire German ammunition.

The NKVD was a police force, they were under no compulsion to use military issue weapons. There are other documented instances of them using foreign weapons, it's not out of the ordinary.

This whole weapon discussion is circumstantial evidence at best, there are plenty of ways it could have happened. And of course Goebbels was eager to report it, it's very well documented in his own records that he was excited about the find and the bad PR it would give the Soviets. The fact that you're dismissing the general consensus that the international community has come to after decades of investigation just to maintain your own narrative is pretty disappointing.

America rightly draws criticism for their strong arm enforcement of "democratic values" through occupation, but you see no parallel to the USSR enforcing "Soviet values" through the same occupation strategy. You've got some massive blinders on.