people think the chassidim are extreme in dressing? Open Rabbi Falk’s book on tznius – think it’s called “oz vehadar levusha” & you’ll be surprised. The same halachos apply to everyone.
The last comment of the 2nd letter writer though, (“there will be no klal yisrael in 20 years..”) was obviously written in a moment of anger, cuz it doesn’t make too much sense. For 1, we all believe moshiach will be here by then…