You are not one who "boos" the Golden Rule. I have thought about that.
Perhaps the "boos" were one of those join the crowd without thinking first reactions. Perhaps it was ridicule as honestly believing that this "Rule of Living" is a mere platitude...naive "Paul" or "pollyannaism."
Or maybe...just maybe whenever we look down on, show no tolerance for, have no respect for those of "other" religions and cultures, THAT is always "booing" the Golden Rule.
It remains a mere platitude found in all religions or a hypocritical regurgitation until it becomes the Word in Action. Only by being expressed in action (by one) and received and experienced (by another) does it become a positive in the Law of Reciprocity.., a rule by which all live and, hence, have "true" liberty.