30? I'd easily go back 50-60 years. Korea. Vietnam. Somalia (other African nations). Afghanistan (although this is the one I'd most agree with). Iraq. Syria.
I'm not saying that most aren't, and I know you haven't been. However, like you, no one held a gun to my head to do what I did.
TRUST ME, I spent 46 months in Iraq. My PL from '09 is in a cemetery in the same county I currently live in. There is not much that has angered me with how the US decided to abandon the area (it fits the MO the last 60ish years though).
The problem is, and I love the movie (Team America World Police), America (for some ungodly reason) tries to be the World Police. F*** everyone else, let's focus on us.
The thing is, man has been fighting since the beginning of time. It's only going to continue. This isn't even taking into account religion, which in my opinion, the basis for 99.999999999999999% of the worlds problems.