That's why 19 Saudi's had no trouble killing men, women and children at the World Trade Center. To them, your children, no matter how young, are not innocents, because they aren't the children of devout Muslims.
When your government was killing men, women and children in say Vietnam and was pouring Agent Orange on them did they consider them innocent or was it according to Christian rules and beliefs?
Agent Orange was used to defoliate the tropical forests so that the enemy could be more easily seen. They also poured it onto the US troops. They thought that it was largely harmless to people, but didn't foresee its cancerous properties.
The war was a mistake to begin with, as the US wanted to stop the Communist push south and thus lied to get us involved in it. That said, the South Vietnamese people didn't want to be under Communist rule. What the west is faced with at this time is a radical religious following that enslaves women, kills those who leave it, kills gays, demands Jizya tax from non-believers and kills those who don't follow its religious tenets. It...IS...the pinnacle of evil.