Why have Spain and Italy sent ships to assist the Gaza Sumud flotilla?

Can Israel survive economic isolation? Why have Spain and Italy sent ships to assist the Gaza Sumud flotilla? Italy and Spain have decided this week to dispatch naval vessels to assist the Global Sumud Flotilla on its way to break Israel's siege of Gaza. The unprecedented move to support a flotilla headed towards the Palestinian enclave comes after repeated attacks against the Sumud Flotilla, including a drone attack early on Wednesday. Israel is widely believed to be behind the attacks.