Well, my son also liked to listen to heavy metal and he went and joined the IDF.
The subject of what music IDF soldiers like is an interesting one (the negev desert 'flash mob' type get togethers in their off hours to dance to technofusion? was interesting to learn about for example. But, it was not the death metal stuff that caught my attention as much as the info about Phil and his impact on his son, Adam.
From my post #1: And so, his dad, Mr. Pearlman, changes his name to Gadahn (saying its from the Bible, though it doesn't exist there) slaughters goats for consumption according to Islamic dietary laws, and when Adam runs away from home (and I can't say I blame him), he changes his name back to Pearlman, for awhile at least. Yep, he's got an identity problem all right!
Btw, I'm a military vet too, and when I was in, hard rock of all stripes seemed more popular overall, though country was a close second...