I've looked into Atlantis a bit recently, and, in fact, read a bit of Timaeus. Plato doesn't quite say that he, himself, got the story from an Egyptian priest, but that Critias, while talking to Socrates, got it from a then-elderly man named Solon, who got it from an Egyptian priest. If the telephone game is at play here, which it most likely is, it's unlikely that the account Plato recounted would exactly match that of the supposed Egyptian priest.
While I don't doubt the possible existence of a lost kingdom that fits the description of Atlantis, I do doubt the full accuracy of Plato's retelling of it.
The timing is way off; that section links to about 1000 BC, six hundred years after the eruption. It's unlikely that the people of Crete would have remembered exactly what happened by that time.
Besides, Crete is almost a hundred miles from Santorini; I don't think it would have been visible. (Some unrelated research I did a few days ago seemed to indicate that, at sea level, the horizon line only goes about three miles.) At best, all they would have seen would be a massive column of smoke and ash, not the mountain it was coming from.
From Wikipedia on the eruption:
Impact on Egyptian history
There are no surviving Egyptian records of the eruption, and the absence of such records is sometimes attributed to the general disorder in Egypt around the Second Intermediate Period. However, there are connections between the Thera eruption and the calamities of the Admonitions of Ipuwer, a text from Lower Egypt during the Middle Kingdom or Second Intermediate Period.[48]
Heavy rainstorms which devastated much of Egypt, and were described on the Tempest Stele of Ahmose I, have been attributed to short-term climatic changes caused by the Theran eruption.[7][8][49]
While it has been argued that the damage from this storm may have been caused by an earthquake following the Thera Eruption, it has also been suggested that it was caused during a war with the Hyksos, and the storm reference is merely a metaphor for chaos, upon which the Pharaoh was attempting to impose order.[50]
There is a consensus that Egypt, being far away from areas of significant seismicAegean. Furthermore, other documents, such as Hatshepsut's Speos Artemidos, depict similar storms, but are clearly speaking figuratively, not literally. Research indicates that this particular stele is just another reference to the Pharaoh's overcoming the powers of chaos and darkness.[50] activity, would not be significantly affected by an earthquake in the
Oh, I don't doubt at all that volcanic activity in general may have influenced the already existing religions that would evolve into, or be stamped out by, Judaism, and even if they didn't know what caused the event, the effects on the people would have certainly influenced the religions at least somewhat.
But that's not the OP's argument: the argument is that YHWH/Elohim
started as a volcano deity (i.e., in this case, YHWH is
literally Mount Thera), which is almost certainly not the case.
Plus, the dating actually isn't right. If the exodus took place, it's most likely that it would have been about 1200 BC, which is 400 years after the most likely date of the Santorini eruption.
BTW, I already knew about the Santorini eruption; in fact, I've known about it for about four or five years.