You’ve just described the conventional pseudochronology. It is very simply not factual.
I don’t know where you got this, or what makes the conventional chronology so pseudochronological, but, but here are the dates of some events attributed to the “sea people”.
Here’s what another site I just found says:
http://www.phoenician.org/sea_peoples.htm
.
Hittite Empire overthrown by the Phrygians (a Sea People) 1180 BC
Levant (East coast of Mediterranean) invaded by the Phoenicians (also Sea Persons) 1180-1876 BC
Invasion of Egypt by the sea people: 1208 BC
The Minoan Civilization was destroyed a couple hundred years earlier by the early Greeks who were a sea poeple.
http://www.timemaps.com/civilization/Minoan-civilization
http://en.wikipedia.org/wiki/Minoan_civilization
I couple of books I read by Geoffrey Bibby years ago place them at this same time frame