nevertheless, yagdil torah v’yadir….
why would there be a mahn de’omar to read the posuk in a negative light, interpreting noach to be ONLY good in HIS generation, but not in avrom’s? if you can just as easily interpret in a positive way, why choose the pessimistic route??
rabbi schwab zt”l writes a beautiful answer. because how can it be that noach who was so great and such to which the torah (i.e. Hashem) describes him as an ‘ish tzaddiq’, how can it be that eventually reshayim and murderers will be his descendants (Pharoah, Haman, Hitler, Ahmadinejad yemach shemom, etc). If he was so perfect, his children should logically follow in perfection. just as a perfect seed, with no flaws, predictably blossoms into a perfect tree with no flaws. it MUST be that there was some smudge, some character defect, some teeny-tiny flaw that can only be discovered by intense and extreme scrutiny. therefore this mahn de’omar searched, investigated and interpreted and twists the words in a very negative way to highlight that THIS is where the chisoron of Noach must be.