With half of the population unemployed and more than 300.000 people subsisting on a dollar a day how could they purchase that "glut of goods"?? You did not mention that Israel blocks almost all exports out of Gaza, which has destroyed the private sector and is the root cause of the unemployment and poverty. Your argument that "Israel only limits the entry of dual-purpse goods that could be used for weapons" is a con. Hamas will get what it needs via the tunnels. You are trying to obfuscate the reality that Israel is inflicting collective punishment on the civilan population of the Gaza Strip.
Netanyahu at Holocaust memorial ceremony: Nazis slandered Jews before destroying them (Haaretz)
from the article: Israel Navy warns last remnant of flotilla not to approach Gaza shore