Interesting part is the dating of the tidal wave - 1200 BC and the appearance of the Sea Peoples in the eastern Mediterranean. The Egyptians called one group of the Sea Peoples Confederacy the Sherdana and it is thought they might have been Sardinians.
The Sea Peoples are a modern invention; there are two references to them in Egyptian contemporary records, which are misdated by centuries anyway. The Sea Peoples left no towns, no distinctive burials, armor, weapons, rulers (including conquerors of the lands they supposedly conquered), written records in their own right, and perhaps most significantly, no wrecks -- the last one being pretty damned peculiar for a massive group of seagoing conquerors.