It's certainly concerning as far a security goes, but it's not implausible that this young man made some inexplicably terrible choices independent of his family

It's certainly concerning as far a security goes, but it's not implausible that this young man made some inexplicably terrible choices independent of his family's views / relationships. I can't imagine what would motivate someone from a free country to decide to go sign up to fight and die for a kleptocracy...