"Believe what you like, but keep it to yourself". But you don't keep it to yourself, do you,, Steve. The very word you use for responses to what you write, "defensiveness" implies an attacker.

My point in asking you to give a scientific basis for your concern was that such things as concerns do not fit too readily into the world view you present. They are oriented to a future that isn't as yet there.

I don't in fact feel comfortable with that adage, "believe what you will, but keep it. To yourself". My preference would be, "Be open about what you believe, but without feeling any need to seek to impose those beliefs on others."