if we look into the heads of people that act stereotypically douchey i wouldn't be surprised to find out that that's exactly what some of us believe. there can be odd paths from motivation to behaviour but from the outside that all comes out in the wash. it's one of the necessary results of the way consciousness works: the image we build of ourselves is based on our intentions, the image we build of other people is based on their behaviour.
this is a reason why a story that we tell about ourselves may not paint the image we expect, we concentrate on the story's motivations but other people may focus on behaviour. in a similar vein, someone being an ass and picking at your story may actually be acting with the intention of expanding your point of view and helping you to avoid misrepresenting yourself.
whether or not the behaviour alone is reason enough to label them an ass or if there needs to be the accompanying intentions as well isn't a question i'm really ready to tackle. christian scholars have debated a similar question for centuries.