bomb and kill children and mothers in a country that is theirs in our attempt to give them what we think they need and not what they want...peace.
A lot of civilians were killed and hurt [by the Allies] in World War II, not just in Germany, but in the countries the Nazis invaded, such as Austria and Poland. And when it was all over, very few of those countries ended up with the kind of government their electorate wanted. Poland, for example, was occupied by the USSR until relatively recently.
Germany invaded France and most of Europe and bombed Britain. The Japanese bombed a usa protectorate
Germany, Japan and Italy were not democracies, any more than Afghanistan's Taliban was elected by the majority in a free and fair election. Yes, some Nazis were elected many years earlier, but they did away with elections around 1934.
By bringing World War II into this, you are begging the comparison. And asking the question "Why should civilians be hurt when it was their country's rulers, which they had not elected, who were to blame?"
I'm not judging World War II, but I just don't see how it demonstrates "a better way" to handle Afghanistan.