Dude, you are confusing about who starting the war and how people fight the war.
For your agrument, i would say US/NATO started the war (Not that i say this is my stand i am just saying for this agrument sake i agree with you on this) But we never said, hey Taliban, use your women and children against us, we will kill them.........They could have leave the children at home, they could have leave the children to their relative, they could have fought us in a conventional way, they could have done hundren thousand other way, but no, they are using women and children and you are blaming me??
How you fight a war is totally up to you, no one force taliban to use women and children as shield. This is on them, US did not push people to use their child as tool of wars. Infact, US are against it. You think shooting at women and children is fun to begin with?? I got some of my guy who go down to downward spral and gone into Alcoholic and having drug problem, some can't deal with it and killed themselve.
You may think the war is unjust but using Children and women to try and stop people and kill them is unjust too, using an unjust method on an unjust war DOES NOT MAKE IT JUSTIFIED
You can blame us on starting the war, but hell if you dump the killing women and children shxt to us, WE DID NOT USE THEM AS SHILED, NOR DECOY, NOR BAIT, Taliban did, doing this base on the clause that the war is unjust DOES NOT MAKE IT RIGHT!!!