Lisa,
Joshua and King David were prophets of Hashem. Please tell me you realize that Bibi Netanyahu and his left-wing coalition are nowhere near the great men that Joshua and David Melech Yisrael were...
If the nation were led by the righteous redeemer, the Moshiach/Annointed One of Israel, I am sure that the Charedim would gladly join in the battle against Amalek and all the other nations which Hashem commands us to fight. But for the time being, most of these people do not believe that the secular Israeli leadership has an iota of Jewish soul(Torah And Mitzvot) in it...
Muman, I'm not comparing the current Israeli regime to Joshua and Moses. On the other hand, I should think religious Jews, Haredi or otherwise, would want to emulate Moshe Rabeinu and Joshua. Where did this idea come from that good religious Jews are only supposed to study the Torah and Talmud and not fight in the army or work?
Now I agree that the current regime in Israel is evil. But I'm having a hard time believing that if there was a religious government, that the Haredis would join in the army. (I know I'll most likely get criticized for this.)