What is wrong with 'taking the hard line against Palestine' in light of recent events?

Answer 1

I'll assume you want the goals to be non-violence and two separate countries.
The only way to achieve those goals is to keep the rest of the world on-side -- the Arab League, the U.S., the E.U, Russia, and of course the UN.
Taking the hard line aggavates several of these groups.

So what's wrong with taking the hard line is that, in effect, it works against the long-term interests of both Israel and Palestine.

Answer 2

The "hardline" is all we have left. We've tried to negotiate peace time and time and time again.. only to have the "Palestinians" reject it at every turn.