My grandfather went through the horrors of Auschwitz and stayed frum, despite the fact that many of his relatives who survived swore off Judaism after what they went through. He established a family in America who are all frum, and his children and grandchildren include sofrim, Rabbonim, and those who are like he was – good, frum Jews who are honest in their daily business dealings, and strive to make a kiddush Hashem wherever they go and whatever they do.
To call him a neb is a huge insult, and you should beg mechilah!