Israel doesn't think it's South Africa and it's not. South Africa had (and has) vast amounts of natural resources, cheap labor, lots of home grown business, and look what the boycott did to them. It's foolish arrogance to believe Israel is immune from a boycott of the whole country. The settlements will fall.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: The boycott movement will not bring down the settlements