So you're saying god created everything so he could show off his ultimate power to the things he created, simply by creating them? It seems like he would have no reason to show off if he's the only thing around. Unless I'm mistaken and there were things around (angels and such) before he created the universe.
This is a difficult topic to explain, as it deals with God's motives. But I'll give it a shot. Before creation, God existed as the Trinity. The three persons of the Godhead were in perfect unity and entirely satisfied. God lacked for nothing. But He did have an overabundance of love. God is, afterall, love. Now, to shower this infinte love on others, He needed to create them. So it could be said that He created the universe to love. But going deeper, the truest love is to do what is best for someone. Beholding God's glory is what is best for us. So in this way, the display of His glory was the cause for creation. God is consumed with the display of His glory so that those who love Him may more fully enjoy Him. That is what love is. That is why we were created. So that we may glorify God, and see His glory in the rest of creation and thereby more fully experience His awesome love for us.
As for the angels, while I do think they were there before the universe was created, they were still created so a part of creation. There was a point where God was the only One there.
Repenting seems like a pretty poor way to redeem ones self. Could an individual kill a ton of people (lets just use hitler or saddam as examples), and then repent on their deathbed and go to heaven?
According to man's justice, yes, it does seem like a poor plan. Live like the devil, and say sorry before you die. But let's take a closer look at just what is involved in the word repenting and why it has any effect.
First off, let's look at what saving repentance is. To repent is not simply to say you're sorry. It is actually to turn away from your sins, to the point where you die to yourself (hence my username). This means that you hate your sin, that you come to the end of where you can put up with your own self. You must deny your own nature, and die to it, being crucified with Christ. You need to do this and trust in Jesus for your salvation. Only then will you be born again. After dying to self, you are rasied as a new creation. God replaces your heart of stone with a heart of flesh. What you previously loved you will hate, what you previously hated you will love. Repenting in faith completely transforms you.
Now, that is all fineand well, but without a good reason why even genuine repentance can wash away sins, it is still not just. That is where Jesus Christ on the cross comes in. This is a problem specifically dealt with in the Bible. God's word states that a one who justifed the wicked is an abomination. So in chapter 3 of Romans, Paul explains that Jesus was displayed as a propitiation for the disply of God's righteousness so that He could be both just and the justifer of those who have faith. Justcie demands that every sin be punished. And every sin is indeed punished. Either we bear the punishement ourselves, or Chirst bore it on the cross in our stead. Now, if one kills millions as Hitler did, or simply lies on his tax retrun, he has commited sin. The punishement demanded for that affront on the glory of God is death. The amount of sin is irrelavent to salvation as the blood of Jesus is infinately valuable. His sacrifice is enough to cover all sins. The reason it is not unfair for Hitler to be forgiven, is that if he had repented, every sin, every murder would have been paid for by Christ. When you repent in faith, you are trusting in Jesus' work on the cross in bearing your sins and taking your punishment.