Maybe the DNA will tell their story.
true, but the thing is that we know that by the time of the Assyrians invasions around 700 BC they are no longer mentioned, so they were probably fully assimilated by then. A small force in the midst of different people would have taken wives etc. from the neighboring Canaanites. Also, if they came initially from Crete, there would have already been centuries of inter-marriage. I don’t think DNA would prove conclusively either way due to these reasons