yichusdik -“If you assume that HKBH wants Torah to defend am Yisroel in every instance, why on earth would Moshe Rabeinu have to demand that Reuven Gad and chatzi Menashe would have to cross and fight, even during a time of miraculous conquest and nisim giluyim? Why didn’t Moshe ask them to sit down in a beis medresh?”
Ya’see your problem (and others) is – you so want to prove that the Zionists are right that you take texts out of context for your so-called proofs!
Let me give you a history lesson. In those times, there was the Bnei Levi whose job was to be -only to serve Hashem, this just wasn’t Avodah, but also learning of the Torah. The others in Klal Yisroel were getting a Nachla in EY. What was the purpose of this land? They were going to use this land for their Parnassa.
Now came along 2 other tribes & a half of one tribe and asked Moshe Rabbeynu for their Nachla over the Jordan river. Moshe Rabbeynu obviously with Nevuah, didn’t have a problem with this – as long as this Didn’t prevent them from doing what the rest of the Jews had to do -namely conquering the land of EY.
Had they wanted in life to just serve Hashem all day -I’m sure they wouldn’t have had to go to the army. The Rambam says this clearly -“Anybody in Klal Yisroel who wants to be like Shevet Levi can…” I’m sure the Rambam wasn’t just talking about from his time on, but from the time of Kabbolas Matan Torah!