HaKatan,
No one held such a ridiculous position. At most someone may have used exaggerated language. Once Rav Aharon Kotler called a certain rabbi an am ha’aretz. The Satmar rebbe was very upset until someone told him that that RK said “am ha’aretz” like he (the SR) said “apikoros”.
Rav Kook held that the Zionist movement (or maybe Herzl, it is not clear what he meant) is Mashiach ben Yosef, whose job is kibbutz galuyot and building the material aspect of EY (“Kol haTor” of Rabbi Hillel Rivlin according to the Gra’s teachings). Rav Yosef Soloveichik held that the Israeli flag has kedusha similar to the bloody garments of a murdered Jew.
I also very much doubt that statement you attributed to Rav Schwab. He was a proponent of “Torah im Derech Eretz”, which was the original Modern Orthodoxy. He may have been talking some people who call themselves MO but are really just traditional and think that half a glass is a full glass. However, it is not an empty glass either. It is certain that he did not say that there is no source for Zionism. Ramban says explicitly (Sefer haMitzvot, mitzvot that Rambam “forgot”) that there is a Torah obligation to conquer and settle EY in our time. Some say that Rambam does not include it because it is included in other mitzvot. BTW, when Rav Shlomo Zalman Auerbach was asked about going to kivrei tzaddikim he said that he went to the military cemetery on Mt. Herzl.