You are very right. The UNSCOP released their partition plan in 1947 and your point about the negotiating process is very relevant as well. This is my opinion, but I feel that Arab rejection of the partitioning process was very much not in their favor and did account for their 'unfair' share of the land. I think the Jews were right and smart when they went about embracing the UN instead of acting divisively. However, my question was about the timing of Plan Dalet. If the Arabs had already rejected the partition (as appears to have been the case in 1947 or before) then it was justifiable for the Jews to prepare for war, regardless of when the declaration date expired. I think that had the Arabs embraced the democratic process in the 1940s and before even, the conflict would have never emerged. I guess it is difficult to expect them to participate in a process to which they were relatively unfamiliar. But their lack of understanding and tact should not be an excuse.
Israeli soldier lightly wounded after being hit by car south of Hebron (Haaretz)
from the article: How to tell when a Mideast Expert is lying