[CynicalBear]

The sin of Onan was that he was not obedient in preserving and perpetuating the name and inheritance of his brother. It had to do with the lineage of Judah from which came Christ and also the promise to Abraham to make of him a great nation. To use it like the Catholic Church does is a perversion of Scripture.

[DarkSavant]

The sin of Onan was that he was not obedient in preserving and perpetuating the name and inheritance of his brother.

One can state this as many times as he wants. It's a modern interpretation, and the shakiest interpretation. Most Christians in history would strongly disagree that Onan spilling his seed had nothing to do with his punishment.

All evidence points to scripture being perverted by Modernists to allow contraceptives.

Also, in Galatians 5:20, Pharmakeia is translated as Witchcraft, and would certainly include contraceptives.