also, don’t confuse good vs evil and right vs wrong with TRUE and FALSE which was state of the world before Adam’s sin.
the nazi’s were wrong (ie, immoral) and they were evil. YES people are qualified to say such things — we are told in the Torah to do “hatov vhayashar b’aynay Hashem”– we are to do good and right things, and to show the goyim also.
so although it was bad, wrong, evil, etc. it was also TRUE – it objectively needed to happen.
read R’Miller and what he writes about why the holocaust happened. he doesn’t mince words when he says why we deserve it.
and i think you meant ramchal, not maharshal.