What kind of Muslim were you? They teach you about all of those.

1) Even if he did, is that a legitimate justification or reason to not worship a true God? If God showed up and played the SAW song and said I would like to play a game, you'd play the game.

2) Because Allah had so many prophets and delivered so many books, you'd think the shaahada is the same for all, so what's the difference? The prophet or the book in case there was one, hence Mohammed being mentioned. You can't be vague about just believing in Allah and that would be your ticket to heaven, you have to be specific because each have their own set of rules, obligations, etcetera.

3) They aren't going to hell according to Islam. First, children can't go to hell. Second, non-muslim don't go to hell. There is a difference between non-muslim and an infidel, the latter is someone who has received the message of Allah clearly and without any political or social influence and rejected it. Those are the one that are going to hell according to Islam, not billions of non-muslims, that's an overexaggeration.

4) Guessing game? look at number 1

5) Thanks for the info.

6) First human beings disobeyed him, we must prove to him that we can be obedient and won't disobey him again. God doesn't need our praying or us to stroke his ego, we need God. This, according to Islam.

7) Where in Islam does it state that devil is overpowering God? Pray and make duaa then he might help. When God loves his creatures, he makes them suffer so that it would test their faith.

I don't know what kind of an Islamic community you grew up in, but these all are pretty basic inquires that they teach the rebuttal very early in Tawheed and Fagh classes.

Sincerely, an ex-muslim