rationalfrummie, your first fundamental error is assuming “we” need to keep control of Eretz Yisrael. This is something Mashiach will do, BB”A. Before then, we are strictly forbidden to take control of E”Y even if the nations want “us” to have it. Unlike many other halachic issues, nobody outside of Zionism (that I have seen) says that Zionists have “al ma lismoch” in their forcible conquest of E”Y and rebelling against the nations, both of which are separate and severe violations.
Your second error is assuming “we” are, CH”V, the same as the Zionists. The Zionists hate our/their faith, and their greatest wish after replacing Judaism with Zionism is, as recently expressed in their “Knesset”, to change Chareidim to Israelis. The Torah is, of course, diametrically opposed to Zionism. We are most definitely not Zionists.
This whole “share the burden” nonsense is a pathetic smokescreen for their real endgame of “integrating” Chareidim into Israeli culture, as the Zionists have openly proclaimed, as above.
Your third error is assuming that a “Chareidi” unit is so wonderful. See the recent articles by the Rabbis who run these units and they all say that even these units are no place for a frum kid. If, for example, a kid would anyways be, CH”V, “in the streets,” then that’s who these Rabbis want in these units. But these same Rabbis in charge of these units write clearly that these units are a very bad thing for a regular frum/chareidi kid.
Additionally, as this tragic movement of getting Chareidim in to the IDF has gained steam, more horror stories, CH”V, have emerged. For example, recently, there was a terrible story of how the Zionists convinced a chareidi man to “temporarily” switch to a different (i.e. non-Chareidi) unit for advancement purposes. As a result of this switch, this man experienced terrible yeridos and his anguished wife cried to a Jerusalem rabbi that “the State of Israel has betrayed me”; the Zionists have, unfortunately, destroyed another frum person and his family.
Finally, only to a Zionist would it make sense to, CH”V, sacrifice even a drop of precious Jewish blood for the sole purpose of helping the State of Israel increase its land holdings. As you seem very concerned about this issue of pikuach nefesh, pikuach nefesh is certainly not pushed aside for the Zionists to try to control more land even if they had the halachic right to any of it in the first place, which they don’t.