Well, we obviously differ in our perspective that a persons height is in the same category of 'possession' as his or her political or other beliefs. My point was that some things about a person are unchangeable, and hence in a sense above criticism, if the point of criticism is to achieve change, others aren't. Plenty of people change their political and religious beliefs based on experience and gaining knowledge or perhaps gullibility. No matter how much wisdom I accrue or dope I smoke I'll always be ginger, male, white and heterosexual. Possibly it is interesting to know those things about me, they doubtless influence my view of the world. But you can't change them. Present me with irrefutable evidence for the existence of God, I'll give up atheism.
For now the fourth time, I don't want or demand to know these details about people, it's just interesting to know for some people in some roles. For example, I would be interested to know if the person teaching my daughter biology was a creationist. It might not lead to any perceivable difference in the way they did their job, just like it might not with Dan Walker. I am a well practiced hypocrite, I supress certain of my beliefs and opinions daily, based on the situation and circumstances, like I am sure the vast majority of us do. And, it may surprise you to know, I frequently do it to avoid upsetting people.
If you think curiosity in the beliefs of others is a sign of living in a totalitarian state, there is clearly a wide blue sea between us. If asked directly I am happy to discuss my beliefs with anyone, and may even change them as a result of the discussion. The only reason I wouldn't is if I thought it would place me at physical risk, or would lead to me being discriminated against. Similarly, if someone expresses a belief I would assume that they are happy to discuss it. I'm happy to concede not everyone feels the same, or they don't feel they can express themselves adequately and therefore don't want to discuss. Fair enough. In Dan Walker's case he has written a book about his beliefs and why he won't work on Sunday and engaged the blessed Joey Barton in Twitter debates about it, so I think it's fair game.