You can't blame the children dieing on anyone but the people responsible for actually dropping the bombs and shooting the bullets.
Violence is almost never the answer, and indiscriminate violence actually never ever is.
No one but the children are without fault in this conflict, but still far too many (more than 0) children pay the ultimate price. You can wage war without killing children, it just costs more. But if you can't pay that price then the war can't ever be considered just.