It could be PTSD. The military would be an excellent source of help if it is. War is tough. Some of his symptoms look like the war took some control from him, and thus something that might look like lack of commitment, being really inability to be controlled without triggering.

Again, if you can, seek out the military. Here in USA the program for PTSD with the military is a superb service. The sooner he gets help, if it is PTSD, the better. If it is PTSD and he doesn't get diagnosed and treated, well, he won't get better and may become full time rageful, or even the opposite of acting out: reclusive.

Let us know what he decides. For you also, it's a long haul...

<font color=green>...I can misspeak like the best of us</font color=green>