Question:

Muslims are meant to believe that god is just, that he is fair but why does Allah kill some people when they are just a child/baby, they die without any sin. or why does he make some people insane and they too are not accountable for anything all of these people die without any sin, but others have to believe in Allah, pray, fast and do other things just so they can enter heaven. Why does Allah do this? If Allah killed me when I was a baby or if he made me insane then I too would my sin be forgiven like them, why does he help these people in this way? How is this fair?

Answer:

In the Name of Allah, Most Gracious, Most Merciful.

All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.

We have to accept all decisions from Allah as good and for our best interest, whether they appear positive or negative for us. We don't know the wisdom of Allah but we believe in His wisdom, and that if we were to be shown this wisdom we would have thanked Him for doing so.

Usually people think that everything is related to this life, but that is totally wrong. We have the Hereafter that is permanent.

The bottom line is:
When we stand in front of Allah and see everything in the right perspective we would thank Him for doing what we thought it was bad for us.

Allah Almighty knows best.

Source: Islamonline.net