Do you have any idea of how small a section of land this whole area is? Trace it over Australia first and think about it. Then visit it and walk with your hands outstretched to measure and fathom its very human scale. Dekel mentioned "of secondary importance" (regarding Israel's security and defensible borders) which certainly doesn't equate to "no importance". His choice of words were weighted with knowledge of an overlapping array of Israeli defensive measures already in place and with some proposed additions not yet implemented. His trust of the PA's true intentions are closer to zero as they had many a chance over the years to purge their historical revisionism fed daily to their children to gird up future generations of militants. If modern Israel was now forcefully growing to the boundaries of the ancient Israelite Empire and exceeding those, you may have a point about "expansionism", until then you're no judge of small, fragile spaces to safely birth families.
4 UN peacekeepers injured in Sinai and taken to hospital in south Israel (Haaretz)
from the article: Olmert's negotiator: Full Mideast peace impossible