When it comes to this Bible story, there are only two kinds of believers: those who have never heard of it, and those who are embarrassed by it.
Here's the story.
The Israelites began to complain about the lack of food and water.
The people spake against God, and against Moses, Wherefore have ye brought us up out of Egypt to die in the wilderness? for there is no bread, neither is there any water; and our soul loatheth this light bread. Numbers 21:5
So God sent fiery serpents to bite the people.
The LORD sent fiery serpents among the people. 21:6a
And many of the people died.
And they bit the people; and much people of Israel died. 21:6b
Then the people apologized to Moses and God for complaining, asking Moses to do something to get rid of God's nasty fiery serpents.
Therefore the people came to Moses, and said, We have sinned, for we have spoken against the LORD, and against thee; pray unto the LORD, that he take away the serpents from us. And Moses prayed for the people. 21:7
God told Moses what to do. Make a fiery serpent out of brass (they had lots of that lying around) and put it on a pole. Then when a bitten person looks at it, he or she won't die.
The LORD said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live. 21:8
So Moses made a brass snake and put it on a pole. And it worked just like God said it would.
Moses made a serpent of brass, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of brass, he lived. 21:9
Now that's a lot more entertaining than a damned holy war massacre, isn't it?
(Numbers 21.6 says that "much of the people died." But how much is much? I guessed 100.)