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"There is ash and pumice in Egypt tied to Thera and dated 1628BC+- and a tsunami on Crete dated to 1645BC+-."

There are deposits believed to be from Thera. The 1628 BC date is based on the ice core evidence, and that doesn't exist any longer. Depending on the depth (and remember, these deposits are not found in contexts by which they can be dated through ruins), they could be from 200 BC, or they could be from 22,000 BC.

There was never a tsunami on Crete in historical times. There's no geological trace of it. The very towns -- contemporary with the supposed supereruption -- which face Santorini show no signs of being overwhelmed by a tsunami. Some of them were burned, but that's consistent with sacking by human hordes. That's a situation to be expected, since inland towns in Crete and on the Greek mainland show the same signs.

"There was never a tsunami on Crete in historical times. There's no geological trace of it. The very towns -- contemporary with the supposed supereruption -- which face Santorini show no signs of being overwhelmed by a tsunami."

Lighten up a little.

Thera, Ancient Greece, 1645BC

The volcanic eruption of the ancient Greek island of Thera was among the largest in thousands of years. Thera's blast collapsed its cone, producing a tsunami often blamed for the fall of the Minoan civilization on nearby Crete. Little scientific evidence for this theory existed until recently, when geologists finally uncovered proof that the tsunami's waves were massive when they hit Crete. They would have destroyed ports, crippled the maritime economy, and led to devastating crop failures, potentially catalyzing the Minoans' decline in subsequent years. Research into Thera's tsunami is ongoing.

"Some of them were burned, but that's consistent with sacking by human hordes."

This occurred within 50 years after the tsaunami hit Crete. Some suspect the 'hordes' were the Mycenes(sp).