If the idea behind the invasion was to destroy Hamas as an institution, then Israel's plans have completely backfired.
The international community insists that it cannot channel billions of dollars in reconstruction aid to Hamas, and is calling for the involvement of the more moderate Palestinian president, Mahmoud Abbas. But Hamas is insisting on sole control of Gaza's rebuilding, as well as claiming moral leadership of the Palestinian people.

In the week since Israel and Hamas declared unilateral ceasefires to bring an end to more than three weeks of fighting, in which almost 1,500 Gazans died, the movement has acted rapidly to assert its control over assistance to civilians.

Sitting on huge cash reserves, Hamas has said that it will begin distributing emergency payments of €4,000 to those who have lost homes, and has already been handing out coupons for food as well as aid, some of it seized from foreign and international donors.
[...]
Mahmoud Musleh, a Palestinian legislative council member aligned with Hamas, added: "The organisation that should be talking for the Palestinian people is the PLO. But it has not been speaking. If it does not rehabilitate itself, there will be dramatic changes. At present it does not represent the Palestinian people. They can longer make decisions. They do not own the power."