The crushed “logic” is the same for both cases (and one can add further examples, of course):
- FACT: Jews are supposed to do XYZ.
- EVENT: Jews were simply prevented from doing XYZ.
- CONCLUSION: Jews are no longer supposed to do XYZ (because there is now a fake “Minhag” not to)… QED.
Rabbi Tau is a major enemy of Jews praying on Har Habyais, see here. The rabbi also opposes reverting to the original nusach of Birkas Haminim, hear Rabbi David Bar-Chaim’s account of Rabbi Tzvi Thau’s opinion here (minute 15:08- 16:13, but the full background is also worthwhile [see, I already posted this gem here twice.]).
Of course, there is little need to focus on Rabbi Tau; the same two coinciding “rulings” can be heard from many other rabbinic figures.
But while the prohibition against Jews ascending the Temple Mount in purity and limits has a shallowly plausible basis, there is no imaginable reason today for saying the censored nusach of “Velamalshinim” against the gemara and all Rishonim. So, we can mind-read here, and realize the true cause for both (and therefore other halachic perversions as well): impious conservatism.