HaKatan has the brocha of a mesorah that long predates zionism.
The Sefer Aim HaBanim Semecha doesn’t contain anything new. It’s a collection of all the old Zionist arguments that have long been disproven. The truth is, his position stood no chance to begin with, because even though Rav Teichtel was a Talmid Chacham, he was opposing the collective Torah knowledge of the greatest Torah giants, including but not limited to Rav Chaim Brisker, Rav Samson Raphael Hirsh, The Chofetz Chaim, the Rogachover Gaon, The Lubavitcher Rebbe (Rashab), the Belzer Rebbe (R. Yisachar Dov), the Chazon Ish, the Brisker Rav, Rav Chaim Ozer Grodzensky, all who were opposed to Zionism and the creation of a State. So he was really quite outgunned from the start. The most extensive work on this topic is of course the Satmar Rav’s Vayoel Moshe, which disproves just about every Zionist “proof” ever conceived.
Example: On page 147 he addresses a powerful statement in Ahavas Yonason by R. Yonason Eyebuschitz ZT”L that it is absolutely prohibited for Jews to take over Eretz Yisroel before Moshiach, even if all the nations want them to, which is kind of a problem for a religious Zionist like Rabbi Teichtel. This is his response: “You should understand that the words of Rav Yonason only apply when there is no sign from heaven that we should all abandon the lands of Chutz Laaretz, meaning, when Jews can live peacefully outside of Eretz Yisroel … but not nowadays, when the words of the prophet came true, [that Jews will be hunted down by goyim]. So when the nations give us permission to return to our land, can there be any doubt that it is the will of Hashem that we return to Eretz Yisroel? I am certain, that if Rav Yonason Eyebushitz was living with us today and saw the terrible golus that we endure, he himself would say to us: ‘Brother Jews! The time has come for you to go to Eretz Yisroel, for this is the will of Hashem, for it is not coincidence what has happened to us in Golus, but rather it is the finger of G-d pointing to us to rise from golus…”
And it gets much, much, worse. This attitude that “everyone has to interpret the world the way I do” often passes the line into the realm of the absurd. On page 98 he deals with the Minchas Elozor, who was a vehement opponent of Zionism. He was vehemently critical in general, actually, when it came to protecting the Torah. And nobody was beyond his scrutiny. Here are some quotes: