They can't even dispose of their own territory, given that Israel builds settlements inside the West Bank. Gaza is totally closed off to the World: Israel decides what comes in or out.
It can be argued, therefore, that Israel is de facto the state.
More like after Hamas fighters took control of the Gaza Strip and removed Fatah officials [0]. So who destroyed their government and effectively haven't allowed any election since? Hamas.
That's not what happened. There was a fair election in Gaza, which was won by Hamas. The new government was perfectly within its rights to remove Fatah officials. Fatah launched an armed rebellion in Gaza.
Wikipedia is hopelessly unreliable on anything to do with the Middle East. -> Didn't read.