Barbara,
That is not a question that can be easily answered. I couldn't possibly come up with a specific date. One would assume it's a long process and didn't happen overnight. All I can do is share snippets from Orthodox sources that fill in a few pieces of the puzzle. Hieromartyr Andronik of Perm wrote in 1907 that France was completely in the hands of the Masons. So we know that the Freemasons can control entire countries.
Fr. George (Grabbe) wrote around 1943:
"The history of nineteenth century Europe is actually a history of growing Jewish influence in it, to the extent that Jews in the first third of the XX century held all European nations, socially, politically and spiritually in their power."
Fr. George (later Bishop Gregory) said "all" European nations.
St. Nikolaj of Serbia said the Jews as a minority, rule over the world.
St. Nikolaj gave a eulogy at the funeral of Dimitrije Ljotić, which was presided by the Patriarch of Serbia.
"Ljotic traces the origins of the Jewish conspiracy to the French Revolution (p.22) and claims that every significant historical event since 1789 (including the Berlin Treaty and the Russian Revolution) was caused by the Jews, and by the European Masonic Lodges whom Ljotic referred to as the 'Jewish Continental Comintern' (Martic, 1980). In Ljotic's writing, Jews are portrayed as the force behind Zbor's three main anathemas: liberal democracy, Freemasonry and communism, and therefore as the movement's (and by extension the nation's) principal enemy (Popov, 1993)."
In 1930, St. Nikolaj wrote:
"The greatest threat to Christianity in the world is not Bolshevism or something else, but Masonry, because it is an enemy [both] external and internal."
So, it's pretty clear that studying the modus operandi of Judaeo-Masonry should be given the most attention, which is what I've done for more than two decades.
Obviously, Hollywood and the media is thoroughly dominated by Jews and Freemasons, who serve the devil, and they have been tasked by their master with using the media and Hollywood productions to indoctrinate and propagandize the masses, in order to prepare hearts and minds to accept Antichrist.
I don't think it's possible or even necessary to pinpoint a particular date in history. It's enough to recognize that the phenomenon is pervasive, permeating the entire world.
P.S. I did not say Musk was not Jewish, that was me citing some AI result about the name Elon. The AI claimed Musk is not Jewish.