I don't think the safety of children in Afghanistan compared to children in the US is even comparable. Unicef identified Afghanistan as the worst place in the world for a child to be born. The horrors a child is often subjected to over there is just not comparable.
Child protection
"Half of Afghanistan’s 30 million people are under 18. They are exposed to extreme situations of violence and abuse due to ongoing fighting, displacement, a poor economy, and harmful social norms and practices. The increased number and frequency of conflict-related incidents has caused an alarming rise in child casualties.
Afghan girls face early marriage, honour killings, domestic abuse, and sexual violence. Afghan boys suffer many of the same risks, along with military recruitment into armed conflict, and sexual exploitation. Both girls and boys are exposed to hazardous labour practices, contact with landmines, and violence at home."