God is defined as a powerful being of all things. At the same time it is said that the god has mercy.
How do you explain the ruthless events in the world. How do you explain bad and brutal situations such as Hunger, War, Violence?
If there is a god, why does it allow it.
The answer is most easily understood in the following several things. None of the following stands alone. It all must be understood together. At the same time, there is much more.
God was making children when He made us. As children have aspects of their parents in them, so we have aspects of God in us.
The world and universe were set up by God without imperfection. But because people are children of God, the world was set up for God-like beings. To say it simply, God placed much of Himself into the universe and people. Then, the people turned against God, their Father.
The crux of God bringing good back into the world and universe, revolves around the question of how God can contradict Himself when His children moved themselves and their universe into opposition towards God. Remember, it is little gods contradicting their Father God. In a funny way, God's first thought was to destroy and start over... because God can't stand even looking at imperfection. But instead...
God sent Himself, directly, in the form of Jesus, a man, Who is also God, to make the correction. Jesus dying a horrible death on the cross wasn't simply a man dying in pain. The fact that Jesus arose on the third day shows that He is also God who died in pain to bring about God contradicting Himself.
So you can see that it isn't a simple thing answering why God allows bad things to happen. Rather, it has to do with not destroying the universe outrightly, and getting for Himself some of the children He wants at the same time. It has to do with God contradicting Himself while at the same time NOT contradicting Himself.
When this world and universe are finally destroyed, it will never be remembered or brought to mind again... not even by God Who could remember it if He wanted. This is the way God is bringing about the destruction of evil and pain and everything bad and imperfect. It isn't an easy answer, but everything was built to be very complex... because God is extremely complex, beyond understanding.
After all, we are only finding out a few of the complex things of the universe right now. For example, if things were simple, science and medicine would have figured out a way for each of us to live for a thousand years long ago.
Now, you. God wants you to be with Him in the joy that He had originally started. Believe in God. Believe in His salvation that He provided through Jesus. This is the only way to finally get rid of the evil that this would maintains.