Frankly, all religions will repeat the same dogma. Except each one will say that they are right. Personally, I think I should believe what makes sense to me.
But doing good things because you want a reward out of it is selfish. And anyone can do good things because they fear the punishment - even a two year old. If at any point you do the right thing because you want paradise, or because you're afraid of hellfire, then you haven't really proven your character at all. You've just shown that you're really in it for yourself in the end, and that you can only do the right thing when the option of doing wrong is taken away. It's a bit redundant, really.
The right thing should be done for the sake of doing the right thing, and because people genuinely deserve to be treated as beings who can feel pain, happiness, hurt, joy and experience the full range of human emotion, no matter who they are. To hurt another person is to hurt yourself.
If Allah (swt) were all-knowing, perfect and merciful - then He would not brutally torture anyone for all eternity, because no one, and I mean no one, deserves that.