I guess Israel's 5M Jewish citizens should go back to Europe, because it is a waste of money and defenses to defend these people while they are surrounded by 600Million Arabs who want to kill them.
Serious issues are rarely resolved by discussing them in terms of emotional strawmen arguments, yonif.
As I said, this was a strategic military decision arrived at by Ariel Sharon, a man of extensive IDF military expperience, who shoulders, as the Israeli Commander-in-Chief, the responsibility to manage his limited defense assets in such a way as to defend all of Israel in the best way possible.
The cost of defending Gaza is not merely $125 million per year (which Israel may or may to be able acquire as mana floating down from Heaven every year). The cost is also in tying up equipment, personnel and other defense assets which may be put to better use elsewhere.
Unless you have unlimited military assets, choices are always being made in war. MacArthur, for example, complained bitterly about being shortchanged in men and war materiel all throughout World War II and he was correct that he was being shortchanged. The reason he was shortchanged was that even a country with the wealth of America had a limit to it's military reasources and it was determined by his Commander-in-Chief that the European Theater had priority over the Pacific Theater.
I will trust the military judgement of Israel's Commander-in-Chief over the grandstanding of a civilian college professor.
"He who attempts to defend everything defends nothing". -- Frederick the Great
The pre-Geneva-Conventions-of-1949 world was a very different one from the one we are living now.