in my previous post I shared an example of my friends behaviour with you. His arrogance was a way of protecting himself. In the past his in laws had made him feel uncomfortable and small. He wasn’t sure what to do with those feelings or how to respond.
His arrogance kept them at a distance thus resulting in them being unable to engage with him and belittle him. Behaving arrogantly can be a way of protecting yourself and making sure other people don’t get too close. Think about how you have felt when other people have been arrogant towards you.