Why are so many 'activists' so anti contact between the future neighbouring countries of Israel & Palestine?

More at Harry's Place and Jeffrey Goldberg in The Atlantic. The Boycott Divestment Sanctions (BDS) movement like many in the anti-Israel movement is not about peace in the Middle East or freedom for the Palestinans it's about the elimination of Israel as an entity and replacing it with a Palestinain state.

'BDS will help bring about the defeat of Zionist Israel and victory for Palestine'

What amazes me is that so many people ignore what people like the BDS activists quoted in the video and Palestinian leaders say and pretend that all that the Palestinian people want is to live in peace alongside Israel.