This is all a dance for the Europeans who are Israel's biggest trading partners. They are aching to turn Israel into a South Africa style pariah state. Don't take Sharon's worlds at face value. Resistance by Gaza settlers works out great for Sharon because it plays well in Europe as Sharon makes ineffectual attempts to uproot them.
Much of what goes on in Israel is a charade done for the sappy Europeans. To keep them happy
Are you saying they really have no intention of going through with the eviction of Jews from Gaza? If so I believe you are seriously misreading the situation there.