Do you think terrorists should get away with what they do? Do you think they can get away with what they do? Eventually, they wont (either in this life or the next - I believe in the cycle of birth and death). God will deal with them, in some way or the other - it's only fair as many millions of innocent lives had been lost. Terrorists need to be penalised for their wrong doings. I understand that that many terrorists are misguided, and so does God. He'll work out the perfect balance. You've gotta trust Him. God works for our benefit (believe it, or not) and whatever he does WITH US, we shouldn't question as we have to realise it's for our overall good. Why do we face the problems we do? So we can become more empathetic and aware of our actions so we don't INTENTIONALLY commit sinful activities in the future.
As a child, your mother or father may have, for example, stopped you from eating too much chocolate. At that time (let's say you were 2) what would have known about chocolate? You would have thought (from experience) that it's delicious (assuming you liked choc). When your parents stopped you from devouring the 5th cadbury bar, you would have been angered, as the delicious taste of chocolate is being taken away from you. Your parents however knew a lot more about chocolate than you (from experience etc.). They would have known that excessive amounts would have e.g. caused you painful toothaches.
More importantly however, they took it away from you not because they hate you, not because they're 'nacissistic pricks', but because they love you. Why would they want you to get a painful toothache that would make you cry? Seeing you in pain would have pained them as well. Therefore they took away the cadbury, knowing that you'd cry or sulk over it for a few minutes (or hours depending on how much you love chocolate) but they had saved you from a much more serious long term consequence, because they love you. The cliched saying 'short term gain, long term pain' applies here.
This parental love analogy can be extracted to the logic behind God's decision making. This is why we should trust him. With your two other questions, we must simply have faith in the fact that he's superior, that he's real
Now, with regard to the misfortune of others, we should help them, not blame God (or them). Whatever they may have done is none of our business.
What are your reasons for thinking about God the way you do? Please answer this question of mine