Earth-alien unity in what sense? Hostile invasion or takeover in the style of Jacobs or space brotherly help and union? Or something else?It's a complex thesis and I couldn't begin to do it justice here (you can "look inside" not that the cost is prohibitively expensive btw). But the work opines that the ultimate goal is Earth-alien unity, and they're currently conditioning humanity in anticipation of their endgame, so to speak.
Again, it's hard to explain the whole of the phenomenon like that - some cases are likely sightings of experimental Earth tech or maybe part of some disinfo, but the real interesting stuff with capabilities far beyond anything made so far by the human civilization is hard to envision as being at full disposal of either Americans, Russians or the Chinese.You are likely right about China, but we know so little about what truly goes on there. It's a big question mark, in my mind. There are days when I lean toward alien or off-world sources. When I lean toward it being ours it is because the more I learn about disinformation, the more complex and likely it seems.
Not to mention that it gets even harder to go back in time to late forties or early fifties and explain stuff e.g. Ruppelt was writing about, when jet engines were just being established and the sound barrier had just been breached, while on the other side the Soviet Union had been recovering from an absolutely devastating war on it's own territory and trying to catch up in the nuclear weapons game, while China suffered from an equally devastating Japanese occupation and not recovering since it was still engulfed in a civil war, or that very war had ended recently.
Let's also think that at the time transistors were also at their infancy and computers were filling rooms. I'd imagine it would be really hard for a human pilot to control a super-maneuvering air-frame without any digital assistance, especially if we think of modern fighters and how much computer tech they really contain.
If it's disinfo - why do that and establish say a functioning disinfo campaign where everyone is talking of aliens but then completely turn that around with the Robertson panel? If you're say a US disinfo agent - how do you contol so many witnesses from different countries all over the world and from different walks of life?
Just that sheer complexity of the phenomenon makes me lean towards the external source explanation. For cases that can't be mundanely explained, that is...