“Mammele” who said “Williamsburg fanatics out to convert the world.” — NO, they wish to be left alone. They don’t insist that that men wear long pants or that women conceal the “cleavage” – they only don’t want to look at it. The only hasidic group that is out to “convert” anybody is Chabad and maybe Breslov (the ones with the dead rebbes).
It is the world that is offended by the Hasidim’s continued existence. According to all secular social science theory, they should have long since seen the light and entered modern society – and the secular world is highly annoyed by the fact they saw the law and decided that secular society was disgusting. The issue is not about a merchant asking customer to conform to social norms of what constitute proper dress (which in fact, is quite lawful and anything but radical, quite common in all sub-cultures even if the standards vary,and but for secular bigotry is non-controversial since the immodest customer can take their business elsewhere).
Which probably explains, in both Israel and America, why secular Jews are pursing a “Jihad” against the hareidi communities. The issue is secular bigotry and intolerance, not hasidim being properly dressed.