The claim of Israeli apartheid is not a hamas claim, it’s acknowledged by various Israelis as well. Neither Gaza nor, especially the West Bank, has had full independence in many years.
Note, I am not talking about any Israeli citizens. I am talking about Israeli non-citizens who live under Israeli restrictions and off-and-on military control. This is the nature of apartheid. A people that is separate, but not fully independent. An in-between state of conquest, where you’re sort-of conquered but not really and have some, but not full, freedoms.