God does not kill us for working on Sabbath. God loves us, why would he do that?
I do not believe in a God who murders people, promotes slavery, supports rape etc either

Don't change the subject. I said "you", not "God".
If the morality is absolute and true as provided by God in the Bible, you should be killing everyone who works on Saturday or is gay.
If you don't, you are either immoral or get your morality from somewhere else, i.e. your morality is not absolute.
Just admit that morality is not absolute and it does change over time.
I would suggest instead that you consider admitting that morality is absolute and eternal.
Sin ultimately is just error. We often forget this and get confused by our own emotions and feelings about particular errors that upset us more then others or from having a strong desire for error.