1.Islam says it is for peace but where ever islam is there there is no peace, why so ?
A. Islam is NOT a peaceful doctrine. It has been spread by the sword. However, that is no reason for any of us to condone the killings of innocent Muslims.
2.Most islamic nations r technically, economically, socially n politically backward, why ?
Because the doctrine of the Quran belongs to the middle ages and has no place in 21st century. However, that is no reason for any of us to condone the killings of innocent Muslims.
Other two questions I will answer in a different post.