Your grasp of the actual historical events are ignorant at best, and willfully deluding at worst. Read some of the serious scholarship of the day - the discussion is not on whether there was expulsions (there was) but whether there was a concerted effort on the Zionist leaders to expel the arabs. You can of course continue living in your Hasbara world and ignore the words of people like Morris who have studied the issue extensively. If nothing else - remember that Deir Yassin happened before the arab armies attacked, and by then most of the palestinian population was already on foot.
Middle East quartet reportedly set to meet during UN General Assembly (dpa)
from the article: Israel pulls textbook with chapter on Nakba