This seems a bit random. Are you saying that things are just 'bad' just because, or because someone said so, or something like that? Ethical and moral codes for living have reasons behind them, as you know I'm sure there have been many attempts at defining morality in a whole range of different ways. It seems obvious that it would be impossible to build a civilisation if some of the things you mention - disregard for one's parents, murder, theft, adultery - were rampant and not even considered damaging or negative in some way. There would be chaos, I don't see how a society could function like that. Lying is a much more common sin, but again unchecked it weakens the fabric of any relationship or set of relationships. Idolatry is a different issue, more determining of the overall direction of the society, which could be practically useful, or not, or whatever. Slavery however has been part of how nations and whole civilisations have been built - like it or not, there isn't a single major civilisation slave labour hasn't been a part of. We can now afford to see it as wrong and unnecessary in the West, and our societies are wealthy enough that those who cannot support themselves can be supported, and we are no longer living in such a precarious society. In the ancient world the complete destruction of whole communities was not the unusual event it would be today, and even in the world today there are many, many people who under one definition or another live as slaves did in the ancient world. Why do you think that is? What options do you think are available to them? Why is it happening? These are worthwhile questions, worthwhile in that they take you down the path to understanding things that actually 'are' that have actual existence in the actual world. 'I don't like it it's bad' is the meaningless statement of a child. The only reason you consider slavery to be bad is when and where you were born, if you had been born in another time and place your attitude towards it would be entirely different. Not so with the other sins you mention, as they are by definition barriers to creating any kind of cohesive society.