"Every time I visit, the situation seems to have worsened...This time, I was very struck by the sense of hopelessness among the Palestinian people."-- from UN envoy attacks Mid-East Quartet (BBC).
Mr Dugard attributed this to "the crushing effect of human rights violations", and in particular Israeli restrictions on Palestinians' freedom of movement.
See also the letter 'Failure Risks Devastating Consequences' from Zbigniew Brzezinski et al.
P.S. 5pm: Seth Freedman writes that "too many [young] Israelis have just stopped caring".