We need to test whether a belief is our identity:

Do we start prefix our statements with “I believe”?
Do we feel defensiveness in the face of criticism?
Are we using defiant language when talking about it?
Do we have a sense of righteousness in our position?
Are we hung up with gatekeeping who gets to use our label?
Do we feel a sense of schadenfreude when an oppositional ideology experiences embarrassment or misfortune?
Do we use epithets when referring to the people who hold opposing ideas?
Have we defended our view publically, now feeling a sense of embarrassment when considering changing our mind?