I think we've missed fairly important
I think this is an indication that Egypt and a few other nations start causing 'problems'.
Maybe that will be the thing that dashs the hopes and dreams of the end of the Cold War.
In the mid-1960s, apparently the Cold War ends, either because the USSR collapses, or simply because is decides to give up on supporting authoritarian puppets in Eastern Europe.
For a while, an "end of history" feeling pervades through the year 1969, just like in ITTL 1993: America is the only standing superpower, the economy is doing okay, Soviet Jews may be granted their freedom, democracy has reached Eastern Europe, China is rebuilding, etc.
But like OTL, a serious blowback caused by Western intelligence agencies in a Muslim state ends up biting them hard.
Maybe in 1970, Egypt's fundamentalist leaders fund terrorism in Israel and in America, or launch an attack against Saudi Arabia. This chaos triggers an oil crisis, while the terrorism forces the US into a prolonged and costly intervention with a Middle Eastern state.
So the OTL 1970s becomes mixed with the OTL 2000s: a decade of both energy shortages
and a costly war on Muslim terrorism/controlling world oil supplies. Not a fun decade to say the least, but there's more.
Like OTL, Japan and Germany and the Eastern Tigers begin their rise as industrialize nations, and hurt America's industrial hegemony. But now, there are two more countries that America has to compete with: a resurgent, and unified China under KMT rule, and a South Vietnam no longer menaced by its Northern Communist brother. North Vietnam's post Ho Chi Minh-leaders, after witnessing the USSR's failures, could also engage in free market economics, again, another thing that could compete with American manufacturing.
There are other unsolved challenges on the horizon: the anti-apartheid struggle, Rhodesia, Portugal's colonies, Syndicalist Latin American resistance to America's heavy-handed policies, Yellow Banner terrorism, neo-Stalinist groups, nuclear proliferation.
Yeah, the 1970s are going to be a very painful decade to say the least, moreso that it follows a geopolitical event that brought joy to people.