AviK, you lost me from the very first sentence you quoted. Surely you can see on your own that simplistic interpretation of the words of people who were light years ahead of us in wisdom and understanding (in Nigleh & Nistar) is vacuous and futile.
Yes there was a ruler whose decrees were tragically like Haman’s. But did he bring us back to the true good path and cause us to do Teshuva? Unfortunately not. Of course it’s not for us to judge, but the sad fact is that many survivors left Torah and mitzvah observance behind when they began their lives anew.