The parent said that: "You don't need religion to learn about morality. Watching Mr. Rodgers or reading Winnie the Poo would do".

My point is that Mr. Rodgers doesn't take all these teachings out of thin air, as is mentioned in the PBS article.

It seems that major themes are taken from Jesus Christ's teachings, and His Sermon on the mount. See: https://www.biblegateway.com/passage/?search=Matthew+5-7&ver...