It is worth watching a documentary titled "The Power of Nightmares" which will give some insight into "why Iraq" and "why Israel." And the answers to "why Israel" will explain why the choice of Lieberman (who is frequently titled "the Senator for Israel") for Gore's running mate appeared to be the right choice at that time.
http://www.amazon.com/Power-Nightmares-Various/dp/B001707D98
If your local library has a copy, I strongly recommend watching it.