I can see how that attitude is going to draw people to Christ.
Mosaic law was intended for Israel which Jesus ended. The aspects of Mosaic law was only for the Mosaic law time period imposed upon Israel. The OT law also says to kill murderers, people who work on the Sabbath, adulterers, kidnapping, witchcraft and sorcery, sins against parents, (which is why Calvin beheaded a 10 year old), offenses against God, treason and rebellion, sacrificing children, sexual immorality, and at times, manslaughter.
"According to the Journal of Couple and Relationship Therapy, approximately 50 percent married women and 60 percent of married men will have an extramarital affair at some time in their marriage.
University of California study in 1998 reported that 24 percent of men and 14 percent of women had had sex outside their marriages. In only 10 years, those numbers have more than doubled."
If we were to impose Mosaic law upon mankind today, about 90% of people would be in jail.