Nothing authentic was "left out."
No. As you can see from the Bible, God never wipes out everyone but always leaves a way of escape thru salvation. He provided that way of escape right from the beginning. Even when there was massive destruction of people during the Flood, Sodom and Gomorrah, and the Exodus, the remnant of the faithful few survived. That will also be the way in the future.
I hope wikipedia wasn't your source.
The link you posted is troubling.
Some passages from that link:
Not good.
