What happened in 1973? It can’t be Munich.
The Oil Shock, caused by the Oil Embargo that OPEC imposed on the West in punishment for assistance given to Israel during the October 1973 Yom Kippur War.
As a direct result, the-powers-that-be in Europe capitulated, and began the march toward becoming Eurabia, with a foreign and domestic policy favorable to the Islamic world.
That meant favoring the Palestinians over the Israelis and permitting the immigration of millions of Arab Muslims into the heart of Europe.
1973 changed Europe forever, and set in motion the likely prospect of a bloody civil war sometime this century that will extend to the Middle East and Islamic Asia.