Pro tip: everyone is they/them until otherwise stated. It sounds counterintuitive until you look at the example of the unknown stranger. You see a jacket left on the back of the a chair, and wonder if the stranger will return. You ask a person nearby, “Do you know who this belongs to? When are they coming back?”
English has always used neutral pronouns for someone unknown to you. We constantly make assumptions about gender based on appearance, and cis people take for granted that our outward appearance matches their gender. My best take on being an ally and inclusive is to default to gender neutral pronouns until someone states it or corrects you.
I second this view. If the interviewer maintains a critical approach to their analysis of the interviewees responses, I see no reason to discontinue watching. However, having a guest who is consistently an unreliable source of information and taking their views at face value screams red flags to me.
Kind of like assessing a new relationship, if your prospective partner becomes someone completely different around friends with opposing views, run. They aren’t an objective source, they are a mirror with a megaphone.