(annexation requires giving citizenship and voting rights to all persons living in the annexed areas).
No, it does not. People keep saying it does, but there is no law that says it has to. If they want to be citizens somewhere, let Jordan give them citizenship, or let them move somewhere they can be citizens. But no country allows aliens to vote. The USA has millions of aliens who live here and pay taxes and must obey the law, but don’t have the right to vote, and nobody sees a problem with that. And often they can’t vote in their country of citizenship either, because that country doesn’t allow absentee voting. Or because they’re stateless persons. Or because their country of citizenship doesn’t have elections. Nobody thinks that gives them a right to US citizenship or to vote in the USA.
Israel can offer the residents a chance to apply for naturalization, but in any country one basic requirement for naturalization is a clean criminal record, and not having political beliefs that are contrary to the loyalty a citizen owes his country. So any Arab who has supported or committed terrorism, or has disputed Israel’s legitimacy, can be barred from naturalization.