@Krumple,
You really don't understand much of anything, do you?
The fact that the guards were armed and the prisoners obviously not would have made no difference whatever if the prisoners had all suddenly realized they were being herded to their deaths, rather than being processed in. There are plenty of precedents of people giving up their lives so that others may be saved. A number would die before the guard was disarmed, yes, but the rest would then be free to flee. There's nothing silly there. Your denial is plain nonsense.
Your second paragraph makes me ponder your claim that you're not a Holocaust denyer. First of all, the bodies had to be handled separately; see, many still had gold fillings in their mouths that had to be removed. As for the method of disposal of the bodies, there was no need to be concerned about "efficiency." The prisoners that had been designated as temporary labor crews instead of being killed immediately were the ones doing most of the "dirty work." There were plenty of them; there was no hurry.