Why do some people refer to their faith when discussing seemingly unrelated matters?

I’ve noticed this mainly with friends who define themselves as Christians. They will make a reference to their faith apropos of nothing currently under discussion.

Is it a constant scouting for the like-minded? Is it a genuine desire to share something that makes them feel good? A reminder to themselves? A holier-than-thou bragging? And how does it make you feel about somebody when they do this?

On a personal level, I don’t mind. I’m happy that they’ve found something to hold onto. When it creeps into a professional/secular area, it affects how I feel about the person’s perspective.

Example: In a public school class while discussing career goals, the instructor went into how Jesus told her she was in the wrong field.

Great for her, but I immediately categorized her as one of “them” and discounted her ability to use logic and reason. Only because of the setting she chose to disclose this information.

What are your thoughts on this?