SE Europe being Greek, Dorian, Greek peoples on the Western coast of Anatolia?
If that's what they're pointing to then I said this all along, in particular with my discussions with Dan Howard about 3-4 pages back.
There was too many indicators to think anything else.
Aegean pottery and weapons (could of been imports but seem to be favored by the Philistines over local products) then for me the big one which is A) a notable difference between the Semtic locals and Philistines in the way they are addressed by other peoples from the Israelite all the way to the Assyrians and Babylonians who all spoke of and treated the Philistines as alien to these lands.
Philistines didn't just have a "reputation" among their enemies, they were spoken of quite distinctively as something different.
Then B) The Egyptians who are the foremost experts on the Sea Peoples in the Middle East having dealt with numerous waves of them either against or hiring into their army.
They specifically mention the Philistines as being the Peleset ......... who were Sea Peoples.
I had no doubt they were Southern European, also factoring in sailing distances travelled in that age, a large number of peoples travelling via sea would likely for me be within a few countries distance wise, Anatolia, Greece, Crete, Cyprus or even Sardinia at a push were the prevalent theories I paid most heed to.
"The authors of the Hebrew Bible made it clear that the Philistines were not like them: This "
uncircumcised" group is described in several passages as coming from the "Land of Caphtor" (modern-day Crete) before taking control of the coastal region of what is now southern Israel and the Gaza Strip "
This as well, would perfectly believe they were from Crete, in fact I'd say at least one wave of Sea peoples that this would be highly likely and explain all of the above factors.