A target — like many others in today’s Doctrinal Demagoguery. It’s interesting that the “One Thought” doctrine holders have aggressively claimed to have debunked the “No Irish need apply” belief – only to have their own claim debunked through a simple internet research of period reference material. In addition to the negative “No Irish” declaration – a number of want ads preferred to use a “Protestant only” affirmative – like an early form of today’s discriminatory “Affirmative” techniques.
You could write a book on the number of truisms that are no longer spoken of, the wisdom turned to face the wall, the back-door bigotry that has been given the run of the house.
The ongoing academic “replication crisis” finds that more than a third of the studies in some fields cannot even be reproduced by independent researchers: many are due to contemporary incompetence; but a growing number of studies are deliberately made up to support a political agenda.
There’s a pretty good chance that the “study” Doctrine holders are citing is just a lie they want you to buy — damaged goods; selling damaged goods.