December 8, 1954: Rome
–by Pope Pius IX in his constitution Ineffiblis Deus.
It was apparently not dogma prior, notwithstanding the Feast of The Immaculate Conception having been established in 1476 by Pope Sixtus IV.
Not until post–Holocaust (1945), post–Establishment of Israel (1948), post–Sinai Campaign (1956), post–Nostre Aetate (1965), post–Six Day War (June 1967), would the trend reverse. The lighting—and Western World –hailed—Israeli victories seemingly against–all–odds resonated globally. Possibly pivoting on this June, 1967 point, with the Holocaust and the resurgent State of Israel as counter–point backdrops, the toxicity would start subsiding.
The Jews had, in the meanwhile, gained prominence in sundry American fields—against significant cultural resistance. Post 1967, soft anti–Semitism’s hold on various segments of the populace would erode. Old canards, generally historically Church–inspired and subtly encouraged, would tend to gradually, but steadily, be upended and trumped by incontrovertible reality. The Jews of America were now rolling.