Agreed. It's their prerogative to have this mindset but i wouldn't necessarily endorse it. I think that not forgetting someone's transgression, letting it creep always in the back of your mind when building/rebuilding a relationship with them, kind of ruins the purpose of forgiveness. Don't mistake my words, i'm not saying you shouldn't build and enforce boundaries, and take measures if broken, but setting something for failure beforehand, it's as the previous redditor pointed out quite a clear example of self-fulfilling prophecy.