Of course you can have an opinion about Islam without having read Qur'an. You don't have to read Mein Kampf to have an opinion about Nazism.
What is the purpose of the universe?" is a silly question.
There is no such thing as a Christian child: only a child of Christian parents.
Faith is not the opposite of reason.
Evolution may explain some features of the moral law, but it can't explain why it should have any real significance.
Being an atheist frees you up to live this life properly, happily, and fully.