I will not take sides on the issue of weather or not more Torah Jews should serve in the Israely army (at least not here). However, I would like to address your point.
The Macabees were fighting under the banner of Torah and were led by those who were solely guided by the Torah. Today’s Israely army does not seem to be guided that way nor do they profess to do so.
Again, I am not saying that I think religious people shouldn’t serve. I am merely pointing out that there is a difference between fighting for the land of Israel and fighting for the ideals of our Torah.