Humans travelling back in time in UFOs

Humans could be using UFOs to travel back in time and stop
World War Three from happening, according to conspiracists
(https://bit.ly/3Kp0haV).
The hypothetical spacecraft may be used to alter the passage
of our historical timeline, it is claimed.
Time travel and extraterrestrial enthusiasts have been sharing
many wild and imaginative new theories since the beginning
of the current war in Ukraine.
But one idea that has really caught people's imagination has
managed to combine both camps — that UFOs are in fact
vessels used by heroic humans from the future who want to
pay us a visit.
The exciting possibility has even been entertained by some
academics, who reckon that UFOs and UAPs (Unidentified
Aerial Phenomena) could actually be humans.
Michael Masters, professor of biological anthropology at
Montana Technological University in the United States, told
Space.com: "We know we’re here. We know humans exist.
We know that we’ve had a long evolutionary history on this planet.
"And we know our technology is going to be more advanced in
the future"
"I think the simplest explanation, innately, is that it is us
[flying UFOs]."
He suggested that the craft could be "anthropologists, historians,
linguists" coming to our own time to "get information" in a manner
not possible with today's technology.
Wonders of the ancient and modern world may even be visited by
'time tourists' wanting to see sights that have long since vanished
from the face of the Earth, Professor Masters added.
But some have gone further than him with their conclusions,
claiming that the supposed time travellers are actually heroes
attempting to save us from ourselves.
Commentators Ross Coulthart and Richard Dolan are among
those to have discussed the possibility of them being on a
mission to prevent World War Three amid the current geopolitical
situation.
The idea of UFOs as time travel devices was branded "highly dubious"
by sceptic Robert Sheaffer last year.
He said: "So, according to Masters, you just spin something fast
enough and it will begin to warp space, and even send stuff backwards
in time. This is a highly dubious claim."