The only nation not allowed to retaliate for a major terror attack

[FBaggins]

47. One correction

Usually advanced countries who are attacked respond by bombing military bases, airbases. weapons depots, warships, and strategic supply lines.

That isn't because advanced countries only attack military targets. All civilized countries (advanced or not) are expected to target the enemy's military facilities. The difference isn't in the relative "advancement" or morality of the attacking army. The difference is in the targeted enemy. Advanced/civilized/moral countries do not co-locate those legitimate military targets with their civilian population. The rules of war actually require this. They're supposed to be protecting their civilians (it's what militaries are for).

The moral soldier tells the civilian to "get behind me" so that the enemy can't get to you without going through me. The immoral soldier puts the civilian in front of himself (perhaps even at gunpoint) - so that the enemy can't hit him without going through the human shield. Then he blames the enemy for killing the civilian when the fault is entirely his own.