Is it a dumbing down of amor fati to use it to accept other people's behaviour and have less expectations of them? It reminds me of stoic tips for a happier life, fabricated quotes by famous philosophers, but does it have any philosophical basis in Nietzsche's work? Specifically, I mean that their behaviour is their fate and inescapable for them (just as your pain is your pain and cannot be felt etc. by anyone else).
So either using it for 'acceptance' or turning it aorund to make it apply to others.