Since Netanyahu created Hamas as a counter to the PLO, I am sure your elections were and are rigged. I don’t know about Carter observing the elections, but I do know that it is very easy to switch votes, hundreds of thousands in a few minutes via computer counting. Back then I believe there was Diebold, ES&S and Sequoia. Quickly, invisibly.
Now the big player is Dominion.
I am also sure every political positions are rigged, down to the Municipal levels and especially the school board.