Question

1. It is known that Stalin killed thousands of people from the academies and the upper levels of the governments he conquered, such as Poland and the like. Seemingly, why did he not achieve his goal by exiling them to Siberia or to distant lands from which they would never return to bite him, since his aim was only to put the upper classes below and the lower classes above—in contrast to Hitler, whose intention was the actual murder of those whom he considered deserving of death.
2. How were Hitler and his people not afraid of punishment for their severe deeds, especially in the second half of the war, when they already saw that their end was near? Not only that, but they even accelerated their actions then, with terrible killings of Jews and other nations, in horrific atrocities. It is also difficult to understand why, in the last months of the war, Hitler sent hundreds and thousands of the "Hitler Youth"—young men and even children, most of whom were killed on the battlefield—after all, it was a completely suicidal mission.