If Israel wants security
then it's going to have to claim the occupied territories for itself. In order to do this the Palestinians are going to have to be forced out. If they do this they won't have peace, but at least their borders will be far more defensible If they give up the occupied territories to the Palestinians, not only will they still not have peace, but their territorial integrity will be compromised to the point that their very existence will be in question.
The territories are small enough to allow for the Palestinian question to be answered quickly and efficiently. Total deportation shouldn't take more than a few months to a year.