lesschumras – I’m sorry, but I think that you are the one lacking knowledge here. I have been living in Eretz Yisrael for nearly 3 decades so I am fairly familiar with the way the government and army work. All boys and girls who are Israeli citizens get drafted when they are 18.
If they have a reason for exemption or deferment, they have to obtain an exemption or a deferment. Yeshiva Bochurim get a deferment, not an exemption, and they have to go back each year to reregister until a certain age at which point they are exempt. During the years of the deferment, they are still subjagated to the army (since it’s a deferment and not an exemption), which means, for example, that they can not leave the country unless they request and obtain permission from the army/government, and even then, they can only leave for a set amount of time.
If I am incorrect about anything I wrote, it was semantics and irrelevant. It is possible that I was wrong in using the terminology “drafted”. I don’t think that I was, but if I was, it does not take away from anything I wrote in my above posts.
I just reread your post, and if what you wrote was correct, then I certainly did not err even regarding semantics. You yourself wrote that they would be considered “draft dodgers” if they didn’t register. That was precisely my point – that they are drafted unless they register. That is against halacha. According to halacha, no Jewish boy should be drafted into an army that does not keep halacha. That is assur. And by the way, this is true regardless of whether or not they are capable of learning full-time for many years.