It depends on how sin is defined One example:1. A transgression of a religious or moral law, especially when deliberate. Sinner has to do with religious/moral law. Lawbreaker is violating laws decreed by society. However violating society's laws would still qualify as sinning as in it's not good to steal or kill. For laws of morality, we must determine who decreed them? If it is divine, it's not something that can be discussed with the creator so the rules would be rigid. And what is our documentation? Old scripts written by man. Poor documentation imo. If we are talking about rules made by man, they vary greatly based on culture and are subject to change. So to describe one's self as a sinner is more individual than you might think. To call someone a sinner must be framed within the society where it originated. Finally to recognize "sin" means what exactly? That God will punish you at some point, or it's simply an opportunity for self improvement? When it comes to religion, "sin" is used as a hammer as your failure before God's eyes with the threat of punishment to elicit the proper behavior.
I was raised as a Christian, but as someone who questions Christian doctrine, not to cause trouble, but to try to understand I'd ask these questions:
Where is Jesus right now? I assume he is partying in heaven. Everyone dies, he had a violent death, not unlike millions of others. When viewed within the framework of human life, death is a tragedy, the ultimate end, a sacrifice. But when viewed in the spiritual context, eternity in Heaven, then your existence in Heaven carries most of the weight. Your life on earth is just a moment, maybe an unpleasant one. Your death takes you to the "good" place. So how much of a sacrifice was it?
God gave Jesus his son to us to slaughter because it would wash away our sins? I have never seen the point or the logic of this cornerstone of Christianity. And if this "sacrifice" cleansed the world, how long did the world remain sin free? Besides killing Jesus what exactly was accomplished?