Q.You actually think it helps the Arab side that they don't want to negotiate any borders?
Because Israel existence is not a function of agreement on borders.
The question is whether Palestinian Arabs want to negotiate ANY borders at all or leave it it open, with the hope that some day violence will get them a better result.
Not-negotiating hurts the average Palestinian Arab more than the Israeli, I mean in real daily life.
Non-negotiation does not make Israel magically disappear, on the contrary.