The point is that 100% support can still be undermined

I'm amazed you still believe that, honestly. As far as I can tell Israel's government support is iron clad and nothing can undermine it.

I’ve yet to learn the full details of the Palestinian electroral system, other than that it is quite complicated.

It definitely is, especially since the P.A. and Hamas can't (won't) form a government together and so elections have been suspended.

My point is Hamas isn't just a gang or something. They are a political organization filled with people who know what they're doing. It's a mistake to assume that they are merely the puppets of other actors like Iran. They have their own ideas, agenda, and understanding.