Rav Aharon Kotler ZTV’L, in Mishnas Rabi Aharon (Vol. 3, Hesped on the Brisker Rav) states that the essence of Modern Orthodoxy is the same as the Reform and Conservative. That is, change Judaism into something that more people will be willing to accept.
Rav Shimon Schwab (Mitteilungen, Bulletin of Khal Adas Yeshurun April/May 1989) says:
“Sometimes the Modern Orthodox halachic foolishness which is flirting with the anti-Torah establishment, may border on heresy. This is all part and parcel of the spiritual confusion of the dark ages in which we happen to live.
Rav Shimon Schwab (Selected Essays pp.160-162) says:
“However, in addition to the legitimate shitos we have discussed, there is yet another, more modern version in vogue called “Torah Umaada”. Apparently this is identical with Torah Im Derech Eretz, especially since both claim a belief in the priority of Torah over maada. Both seems exactly alike, but like two left gloves which cannot be worn together, they don’t fit! . . .
“Rav Hirsch ZT’L has inscribed two emblems on his banner. One is Torah Im Derech Eretz and the other is the so-called “Austritt”, which means severance, or total and non-recognition of any type of institutionalized heresy, “minus” or apikursus. This is also a resolution not to contribute, participate in, or support any cause which accords validity to the disbelief in Hashem or to the denial of the authenticity of Torah shebiksav or Torah shebaal peh. In other words, “Austritt” states that the Torah is our sovereign ruler, and it makes us independent of all those who deny its Divine origin…
“To summarize, Torah im derech eretz without Austritt is considered treif l’chol hadeios! Even if you call it Torah Umaada.”
Rav Shimon Schwab (ibid p. 89):
“Let me single out two examples where silence is not permitted . . . “The first item is Modern Orthodoxy . . . most of it has become stale, stagnant, and fossilized, and we could not call it modern anymore. “In the meantime, the contemporary generation has advanced and risen to higher standards, Boruch Hashem. We are witnessing the rise of a new type of American Orthodoxy. This is the Yeshiva and Bais Yaakov generation . . . This is the new generation of Bnei Torah and baalei batim who do not intend to stand still and remain satisfied with a tiny yarlmuka or a teaspoonful of Jewish knowledge…They are marching on! And so we are zocheh, Baruch Hashem, to prestigious yeshivos gedolos in America and American-born Roshei Yeshiva , rabbanim, and poskim. “Today, our youth in America is the real Modern Orthodox, if you must use this expression, and they are marching forward. Whether they belong to chassidishe, yeshivishe, or Torah im derech eretz variety, they are marching forward, step by step, to a more wakeful form of avodas hashem. . . Their greatest pride and joy and nachas consists of children who are talmidei chachamim, bnei torah and bnos Torah.”
Rav Shimon Schwab (ibid p. 151):
“Shameful are the ways of the glorified am haaretz who . . . condones the aberrations which Hirsch condemned, such as religious nationalism, Orthodox-Reform collaboration and neutral Judaism. Foolish are those who sympathize with the “Department Store Academy”, where Brisk and Slobodka are offered on the first floor and Graetz and Dubnow on the second. When such a person takes Rav Hirsch’s name in vain, wielding Torah im derech eretz like a weapon against recognized Torah schools, he becomes somewhat ridiculous! “What a travesty! Rav Hirsch, who was the warrior without compromise against those who hated the Torah, has to let his memory be invoked today against those who love the Torah. . .