Gaza isn't a separate country, the Palestinians are still Israelis in terms of international responsibility and national membership, seeing as how Palestine is not a recognized independent nation.

How do we know this? Because Israel isn't under sanction for the activities they are undertaking that would be considered war crimes if done to another nation.

It is a long-standing civil war that a couple generations of national leadership have failed to find a long-term resolution to. The current resolution of trying to ghetto the Palestinian people into controlled territories ("reservations," if you will, a common strategy used by colonizers to "handle" the native population) doesn't seem to be bearing fruit other than intergenerational violence.