Releasing POWs back to countries that were thoroughly defeated wasn’t a problem because they were being released to a nation that had lost the will to fight.
There were still nazi sympathizers in postwar Germany who tried to carry on a guerrilla war against the allies but within a couple of years the German people themselves rose up against them.
“There were still nazi sympathizers in postwar Germany who tried to carry on a guerrilla war against the allies but within a couple of years the German people themselves rose up against them.”
Those “insurgents” that were caught were promptly executed by occupation forces. They were not given 3 hots, a cot, and a copy of “Mein Kampf”.