Useful idiot is a pretty common term.
The delusions I'd say you have shown around here are those of having the fantasy of being a zealot soldier. You romanticise that too much.
But then again, The stories and information posted here are artistic works of fiction and falsehood. Only a fool would take anything posted here as fact.
Military is only a means to an end, but yea, I have passion in my views, if that makes me a "useful idiot" in your eyes, then so be it. I'm not going into the American Military to fight for my country or for US interests. I am using it for combat training and practical knowledge.
I guess in some sense I'm a zealot sure. Sure, I romanticise it, but I don't see myself as going to be some big badass or savior of mankind. I don't think I'm delusional in the sense that I think I'm superior or invincible. I just have my goals in life, and it's going to be rough, it's going to be painful, but it's what I view as must be done.