Luke 6:28-29 teaches blessing those that curse you, praying for those that mistreat you, turning the other cheek, and giving a shirt as well to someone that takes a coat. For all practical purposes some would argue that the scripture thus teaches that if someone inflicts an abuse that the Christian is just simply to not only continuously tolerate it but also to continually give grace back to the offender. Overall, I have spoken to now adult people that have been molested as children and many other such people that have claimed that forgiving the offender and turning the other cheek can actually be detrimental to ongoing mental and spiritual health.
Obviously if a person is being molested or abused in some way, then getting out of the situation in order to prevent future abuse can be a very good practice. The legal system even provides methods for separating people like in the case of restraining orders and such, and using those methods may not suggest an unforgiving heart but instead it could simply promote the desire to keep out of a bad situation. One must also be reminded that some people inflict such harm onto others that having them prosecuted for that harm can actually make others safer, happier, and healthier.
When I was in High school, most everyone generally always had very little respect for me, looked down on me, and treated me extremely poorly. Onetime in an art class a student started to punch me in the arm regularly because he knew that I would not fight back, and this caused his friend to start punching me in the other arm regularly as well (repeatedly for the entire class time). This continued not only all throughout that class period that day, but it also continued into several days as well whenever the class would get together. The problem got so serious that my upper arms became extremely tender to the extent that future punches multiplied the pain. The situation came to a breaking point when I had enough and struck the main man that had been punching me on the back of the neck when he had his back turned to me, and as a result it was only at that point that the school made a decision to do something as the school penalized both me and the other two students for fighting. The point is that if I would have either continued to endure the situation or taken very aggressive measures to avoid the situation, then I would not have been penalized for fighting later on.
One could see in my example how the school system would suddenly have a reason to take actions against me because I fought back, and as a result by me fighting back it looked like two people had a problem between each other. Before I fought back, the shame of the aggressor was clearly demonstrated, but the school system ignored that message for a very long period of time. The point is that the advice of Christ to turn the other cheek and to love one’s enemies prevents the world from seeing what they want to see because the world wants to see that Christians are just the same as everyone else in that they are driven by greed, use religion as a hobby, use godliness as a front, and are not genuine. Overall, if the world is proven wrong by Christians being able to turn the other cheek, forgive, and love enemies, then it makes the system that judges between people obsolete, unemployed, and without a purpose.