It is Allah who puts you in the hellfire. Satan has no power to do anything to you except what you allow him to do. Perhaps an ideal person would be capable of fearing nothing except what Allah could do to him.
However, "fear of God" is an easily misunderstood concept. Here is how the Christian theologian C.S. Lewis explained it. Let’s take three different scenarios.
1. There is a closed door. I tell you, “There is a ferocious, man-eating tiger behind that door,” and you believe it. You feel “fear”—in the sense of a primal instinct, something embedded deep within the nerves. It’s something shallow, animalistic. But very powerful.
2. There is a closed door. I tell you, “There’s a ghost behind that door,” and you believe it. You feel “fear”—in the sense of a strange sensation. The tiger may give you a shudder, but it won’t give you goosebumps. This is something harder to describe. More eerie, not as shallow and not as commonplace. Less about survival instinct, more about a sense of the unknown and the…just plain wrong, for want of a better way of putting it. You feel like the natural order has been violated or something. This is more uncanny. We might call it “dread”.
3. There is a closed door. I tell you, “There is a mighty spirit behind that door—something beyond your comprehension,” and you believe it. You feel “fear—in the sense of what is called “the numinous”. This is more like awe. It’s closer to #2 than to #1 but really in a league all its own. It’s not as unpleasant a sensation as the others, although it may still be more than you bargained for. (I almost want to quote “Watchmen” here but I fear I’ll be misunderstood.)
Anyway I think you’re starting to get the point. “Fear of God” is in the sense of #3—although if you’re strongly tempted to do something truly horrible then #1 is appropriate to the situation because that tiger does bite. You don’t really have to feel obligated to feel any of these emotions at all though. What’s more important—though this is off the top of my head—is to love submission.