1. "If God created everything - then who created God?" (may Allah forgive me)
5. "Why did God create everything?"
Allah says in His Quran that He did not create all of this for any foolish purpose. He tells us that He created us for the purpose of worshiping Him, Alone and without any partners.
6. "Is God pure, good, loving and fair? - If so, then where does evil, hatred and injustice come from?"
Allah tells us that He is Pure, Loving, and absolutely Just in every respect. He says that He is the Best of Judges. He also tells us that the life that we are in is a test. He has created all the things that exist and He has created all that happens as well. There is nothing in this existence except what He has created. He also says in the Quran that He created evil (although He is not evil). He is using this as one of the many tests for us.
7. "Does God really have power of things? - If so, then why does He let people become sick, oppressed and die?"
Oppression is something that Allah forbids for Himself to do to anyone and He hates it when anyone oppresses someone else. He does have absolute power over everything. He allows sickness, disease, death and even oppression so that we can all be tested in what we do.
8. "Can you prove there is a God?"
Can you prove that you exist? Yes, of course you can. You merely use your senses to determine that you can see, hear, feel, smell, taste and you have emotions as well. All of this is a part of your existence. But this is not how we perceive God in Islam. We can look to the things that He has created and the way that He cares for things and sustains us, to know that there is no doubt of His existence.
9. "Does God know everything that is going to happen? - Does He have absolute control on the outcome of everything? - If so, how is that fair for us? Where is our free will then?"
Whatever we intended, is what we will have the reward for. Each person will be judged according to what Allah gave them to work with, how they used it and what they intended to do with it.
Whoever choses to worship Allah without partners and is devoted to Him and is obeying His commands as much as possible, has grasped the firm handhold that will never break. Whoever denies God and choses some other way to worship or not to believe at all, for them there is an eternal punishment that is most horrible (Hell).
Predictions in the Quran have come true; and its teachings are clearly for all people, all places and all times. No one has been able to produce a book like it, nor ten chapters like it, nor even one chapter like it. It was memorized by thousands of people during the lifetime of Muhammad, peace be upon him, and then this memorization was passed down from teacher to student for generation after generation, from mouth to ear and from one nation to another.
Today every single Muslim has memorized some part of the Quran in the original Arabic language that it was revealed in over 1,400 years ago, even though most of them are not Arabs. There are over nine million (9,000,000) Muslims living on the earth today who have totally memorized the entire Quran, word for word, and can recite the entire Quran, in Arabic just as Muhammad, peace be upon him, did 14 centuries ago.