I personally believe that the remaining jews who never left Judea were forcibly converted and intermixed with the invading forces over the course of history, as many other diaspora jewish tribes did within their wanderings and settlements.
A two state solution isn't possible now, and has exposed the double faced hypocrisy of the jewish history of expulsions and genocides. It's better to sadly remove the current Palestinians as a way to improve their living conditions. They don't need to suffer under an American backed apartheid state waging total war against a state built upon Machiavellian pretexts. I do wish them good luck out breeding the current Jewish population. They're doing a fine job, but again, they're adding more souls to the soup of sufferings.