Furthermore, fighter planes are not made to kill, not anymore than kitchen knives. Sure they can kill - but that's not what they're there for. Peak oil is not an energy crisis. It is a liquid fuel crisis.
A kitchen knife is for cooking with: it's a kitchen tool.
Your analogy is broken, unless you can't tell the difference between serving dinner and severing heads.
Planes are weapons. They are made to serve a function in the kill machine, even if fighters are perhaps not the most direct instrument for mass murder.