There are two ways of dealing with Netanyahu. The first way, championed by the Clintons, requires us to repeatedly embrace and reassure him in the hopes that it will give him the confidence to make difficult concessions. The second way, espoused by Obama and Sanders, involves calling him out whenever he acts in a way that is contrary to the interests of peace.
The Clinton method makes for better domestic politics, while the Sanders/Obama technique is more emotionally satisfying. The bottom line, however, is that neither approach actually works; in the final analysis, we have about as much clout with the Israeli government as the Chinese do with the North Koreans. The Palestinians have undoubtedly taken note.