You'd have to be pretty heartless not to care about the unnecessary suffering of people in this world. But unfortunately it happens and it is not God's fault. Having faith in God/Allah/the Universe, etc, often helps to give people hope and understand why suffering is part of our world. However, it is hard for some people to have faith in any God, and others choose not to. That's ok, we all have to do/believe what's right for us and what makes us feel good.