Why are those outraged as the prospect of a halachic analysis that suggests the war is unnecessary, a view held by many gedolim, and recognized by some secular scholars as well (since had the Jews of Eretz Yisrael settled for autonomy rather than demanding the expulsion or subjucation of the Arabs, there would have been no war) so insistent on emptying the yeshivos and forcing students whose ideology they can’t stand to be in their army. If they feel that the Israel was against the Muslims is a righteous war of self-defense , and that it is a mitzvah, they should be quite content to limit the army to those who wish to do the mitzvah.
Do we conscript people for other mitzvos? Do we drag people off the street and make them learen gemara? Do we raid the nightclubs and other place of disrepute to make women light candles on Shabbos? Do we have an “aktion” against treff restaurants and force-feed kosher food to the customers? If you believe it is a mitzvah to schecht Arabs, why do you need to conscript anyone for your mitzvah?
Or perhaps it is that many secular Israelis have growing doubts at the wisdom of provoking the Muslims into a war by attempting to rule over them against their will, and then seizing their land and “doing to them” as they had been “doing to us”. That certainlyu explains the massive draft dodging (evasion, not refusal) of secular Israelis