Musket,
A sweeping statement like that, which just about every Christian would bristle at isn't "merely" anything but is provocative.

No.
Just about every Christian understands that the commandment is about murder not killing.
Ask some.
You have family members who are Christian, and a priest I seem to remember.
Prayers are regularly offered for our armed forces in my typical CofE church, and there are Chaplains provided by all the main Churches including Islam.