Why no 'tough love' for 'Palestinians'?

Bret Stephens points out yet another Liberal double-standard: 'Tough love' for Israel - real love for 'Palestinians.' For those who don't have access to the Wall Street Journal, you can also find the full article here. Why is it that Liberals insist that Israel needs 'tough love' for them, but support for the 'Palestinians' is knee jerk and absolute? Part of the reason surely has to be