What is revenge?

The other day I read a message on Facebook that someone had posted. What the post was about was less relevant than the responses that followed (not to be arrogant, I mean relevant to the topic of this post). I posted an answer to it. I wrote that God will take revenge for the sins that you haven’t confessed and asking forgiveness for them before dying is a good idea. The person wrote back that God was not vengeful. So I then answered back if God is not vengeful why does it say in the Bible that if you die and haven’t confessed your sins before dying then you will go to hell and burn for eternity? To me that would be revengeful of him for that person not listening to His words.

If that isn’t vengeful then what is it? If one of the kids ask you if he/she can go out and you say no because last night you did not come in at the time I told you (you didn’t listen to me), you are punishing that kid and you taking revenge for that kid not listening to you. That doesn’t mean that you are a bad person. It’s just that you want your kid to obey you. This is the same as the Ten Commandments in the Bible; if you defy any of those commandments then you are disobeying the Word of God. Therefore the punishment would be to burn in hell for all eternity.

Now this burning in hell for all eternity in a way doesn’t make too much sense to me for one reason. What if, on a winter morning bright and early you walk out to go to work and the sidewalk is icy and you fall? Now your upset and you say "Christ, why don’t they salt these sidewalks?" You're upset and using Christ’s name in vain. Then what if you walk out onto the street and get run over by a car and killed instantly? Does that mean you go to hell and burn for all eternity for having used Christ’s name in vain on the spurt of the moment?