You may have noticed that God, after his first mass murder, showed a bit of remorse for needlessly killing pretty much everything on earth. He even promised to never "smite any more every thing living."
And he kept his promise, too, as far as anyone knows, for another ten chapters or so (a few hundred years maybe). But in the end, God couldn't resist the temptation to kill again.
Abraham tried to talk him out of it, though. He and God and a couple of God's friends had been hanging out all day together. But after eating a big meal and getting his feet washed, God and his friends decided it was time to go. They were heading off toward Sodom (slouching toward Gomorrah) and Abraham decided he'd better tag along.
As they were walking along, God said (to himself?), "Shall I hide from Abraham that thing which I do?"
How's that for weird? God asks himself if he should tell Abraham what he is about to do (which is, of course, kill everyone in two cities). He doesn't know what to do. Is he afraid that Abe will talk him out of it? Or try to stop him? Or what? Or is he just embarrassed to be having bad thoughts again?
But God finally snaps out of it and tells Abraham what he's up to. He has heard that the people in Sodom have sinned and he's decided to go to Sodom and see for himself.
Abraham was on to him right away. He said, "Wilt thou also destroy the righteous with the wicked?"
God, who is one of his moods, ignores him. So Abe starts to bargain. What if there are 50 good people in Sodom? Would you kill them, too? "Shall not the Judge of all the earth do right?"
God says if he can find 50 good citizens of Sodom, he won't kill everybody.
So Abe tries 45, and God says he wouldn't kill everyone if there were 45.
Abe keeps going this way (knowing that God is a tad slow). How about 40? 30? 20? 10? And each time God answers the same way: If God can find a few good men (well ten, anyway), he won't kill the whole city.
And then God just takes off and Abraham goes home. "And the LORD went his way ... and Abraham returned unto his place."
But God's two friends (they're called angels now) keep going to Sodom. Lot invites them in and gives them the usual God treatment (washes their feet and feeds them). Then a strange thing happened. (Strange things often happen in the Bible.) Every man in the city of Sodom came to Lot's house and demanded to have sex with Lot's two angel friends.
The men of the city, even the men of Sodom, compassed the house round, both old and young, all the people from every quarter: And they called unto Lot, and said unto him, Where are the men which came in to thee this night? bring them out unto us, that we may know them. Genesis 19:4-5
Man, those must have been some good looking angels!
Lot's response was to protect the angels (who you'd think could take care of themselves!) by offering the sex-crazed mob his two virgin daughters instead.
Behold now, I have two daughters which have not known man; let me, I pray you, bring them out unto you, and do ye to them as is good in your eyes. Genesis 19:7-8
[This is a man, by the way, whom the Bible calls "just and righteous" in 2 Peter 2:7-8. A few verses later he will get drunk and impregnate both his virgin daughters (see Genesis 19:30-36), but that's another lovely Bible story.]
As it turns out, though, there is no time for Lot to make good on his kind offer because God is getting ready to commit another mass murder. The angels strike the people of Sodom blind, tell Lot, his daughters, and wife to flee, and then all hell breaks loose.
The LORD rained upon Sodom and upon Gomorrah brimstone and fire from the LORD out of heaven. Genesis 19:24
Okay, so that's it. That is God's second mass murder.
But how many people did God burn to death in Sodom and Gomorrah? Well, I, of course, have no idea. I don't think any of this actually happened. But those who believe this crap say it was between 600 and 1200.
Since I'm only shooting for order of magnitude type accuracy here, I'll just say 1000.