Well it all started when God was at this one party at the Beta House. Mind you this was back when he was attending Void University. He got really smashed and took on a dare. He had to make a universe, and a sentient species and let them run around on their own.
So he did that after recovered from his massive 2-day hangover and realizing he made a girl pregnant (named Mary).
The sentient species started to evolve. God was bored so he went ahead and teased a few fellows about himself and how he's all-powerful. Well, they took it too far apparently. Mary was also due in about a few years too. So everyone believed them about Jesus. Some people did a game of "telephone" and screwed up the whole idea and got Islam and Judaism.
Then the year/day finally came, Raptor Jesus was born! Unfortunately Raptor Jesus, being part raptor, had a raptors head and therefore was really loving bizarre (no matter how awesome) so God created a plastic surgeon to make him look normal. Then he hid him in the far corner of the Earth until modern day arrived (and shortly erased his memory of working on Jesus/living in a cave for ~2000 years).
So Jesus ran around preaching, died, came back and died again of natural causes. Then the "dark ages" came where the kings decided everyone should be poor and stupid, except for royalty, who'd be ONLY stupid, and we lost 1000 years of possible scientific experimentation/advancement. Yay! At this point God was grieving at us and wondered, "What the forget have I done?""
Eventually time moved on, other religions appeared and everyone believed what they want to believe, whether it be that we appeared from the bowels of the flying spaghetti monster, mystical alien soul-demons appearing randomly from a volcano or karma and incarnation relations.
Advance at least a few hundred-thousand years. Human kind now populates at least ~2000000 galaxies and practically owned almost half the universe. Eventually they found what was known as the Void (an obscure part of the dimension which was God's home in one little corner of the dimension). They also found God and asked him many questions like "is Jesus real" or "are you real" and even "does this mean Christianity was right?"
He simply smited them for finding his corner of the dimension. Too late. The human race already had his location. He had two choices, destroy EVERYTHING or die himself and let the humans evolve. Considering he had seen what could happen in that one terrible 21st century computer-video game dubbed 'SPORE', the humans could ultimately forget up the entire plane of existence by
entering too many cheats destroying the galactic core for scientific reason.
So he destroyed everything in that year. Everything was gone as of 2012

tl;dr we're super advanced race and we die in 2012.