Jesus is just a fictional character made up by drunken sheep herders....I would love nothing more than to bring this character into existence, then execute him violently right in front of his brain-dead followers....yeah....Daddy has a dark side......
It's a book that is supposed to be filed in the fiction aisle. The writers could make the story go any way they wanted it to go.
Asking why something in the bible happened is the same as asking why something happened in Game Of Thrones.
A ridiculous question.
Technically, both she and the man should get stoned, but women received the brunt of the punishment, and for at least a couple of reasons:
Always liked that story. It's one of those that really illustrates the fairy tale quality of the bible, even without the magic parts.
An angry mob of self-righteous religious men, and not one of them believed he was without sin?
To answer your second question: Some men hate women and will take any chance to "legitimately" punish one.
The story is a very late addition to the bible, possibly only added in the middle ages, and even if the bible is not total fiction, this story almost certainly is. And in any case the woman is not the point of the story but only exists to show up the falsehood of her accusers, it would work just as well if she were a man or a thief or a murderer the details are trivial.
There is a very common hypothesis among historians that most of the more liberal of the Jesus teachings are the later additions, and that the hard line old testament preachings were the only ones in the earliest lost copies.
That pericope to which you refer is not found in many of the manuscripts and, when it does appears in wildly different places. So there's a lot of textual doubt about it.
Putting that to 1 side, no one knows why she cheated. There is no information provided to tell us, for it's not germane to the author's aim.
The man under Torah would have been punished. He may not have been married. However, this pericope focusses on her so as to make the point that those doing the stoning are hypocrites.
The whole pericope is a moral tale about hypocrisy but it's probably a fictitious tale
Why did she cheat? Do you seriously want us to speculate on something we can't possibly know? There are a million different scenarios that could have been the case if this even really happened. It could have been justified or not but is this even relevant?
Why didn't the man get punished? Maybe he did. The old testament says that both should get killed. But maybe there is also some sexism involved in this scenario, it's not like bible has a shortage of that.