hatbg – what??? Chassidim would never break their minhagim and dress like some american, and I dare you to find me one chassidishe group who did that – just one, because there is no way that is true. MO has normalized greatly in recent generations and what I am about to say has nothig to do with the present-day MO, so please do not take offense – but to claim that the frum world was mostly MO is a odious lie.
If this were so, more gedolim would have been from MO, but where were the gedolim from pre-wwII? Litvishe yeshivos and chassidishe circles. And you go ahead and say that a litvishe rosh yeshiva, like Rav Weismandle, or Reb Ahron, or Rav Hutner, the Rogotchover gaon, the Bais Halevi, or Reb Elchonon, or the giants in the chassidishe world, like The Imrei emmes, the bluzhover rebbe, klozengerger rebbe, the satmar rov, the munkatcher rebbe – were modern! They had tremendous ahavas yisroel and loved every jew, modern or not, but to say they themselves were such is simply not true.
Majority is shown by representation – MO had one leading figure in its infancy, and he himself was very much against a lot of what went on in those circles – plus, Rav Soleveitchik entered the scene after WWII – before then, MO was a radical, borderline-reform attitude fringe. Rav Soleveitchik structured the movement, which hirtherto was led by balbatim and am haratzim who thought they could keep people frum by loosening (read: breaking) halacha.