Yes you are right, DNA evidence shows that Palestinians have ancient roots to the land. In fact, Palestinian roots are most probably a mix of ancient Canaanites, Islamized or Christianized Hebrews who weren't kicked out by the Romans or emigrated, and immigrants from the neighbouring Arab countries. Notice the second connection I listed. The point is that Palestinians and Jews are (also genetically) very close cousins. Both peoples love the land and are connected to the land and have a right to live there! Instead of getting caught up in our ethnocentric narratives, let's all be less hateful and angry and find a way to live there together in peace already, in whatever political format deemed to be the best compromise!
Four Libyan soldiers said killed in battle with Islamists in Benghazi (Reuters)
from the article: Palestinian archeology gets int'l boost ahead of 2011 statehood plan