Oh I love ISFJs. Unlike INFJs you could beg and beg and crawl back to them and sooner or later they would forgive you. And beg and crawl I always do when it comes to ISFJs, especially females.
So have you ever been door slammed by an ISFJ? Or have you (ISFJ) ever doorslammed anyone for good?
From what I have noticed is that ISFJs are way more forgiving than INFJs. Is it a functional factor? But how could it be? Isn't Si what would plague one more for the wrong doings done to one/them by another?