Hamas reminds Israel who is boss in Gaza. Indeed, Israel will have to fulfill the Hamas conditions for delivery because it has already promised to release all flotilla members and to deliver all the goods the ships carried. While Hamas delays the delivery, it embarasses Israel by indicating that its promises have not been fulfilled. And when the full conditions are satisfied, Hamas will claim some "victory". It will then actually look like a victory. If Israel wants to avoid this pitfall, it should quickly ship the truck content to the Turkish organization which brought them in.
Saudi forces kill two militants after failed car-bombing (AP)
from the article: Hamas blocking entry of flotilla aid into Gaza