He may be confusing action with Bradleys for the "bulldozer assault" where armored bulldozers were used to plow over a trench network rather than sending in gro

He may be confusing action with Bradleys for the "bulldozer assault" where armored bulldozers were used to plow over a trench network rather than sending in ground troops to clear it out. Personally I don't see how getting hurt yourself has any impact on whether attacking someone is justified. There is no scenario in which killing someone with a knife is more justified than killing them with a gun or a bomb.