They care enough about peace to give land back in pursuit of it. There are multiple political parties in Israel. The ones that engineered the Gazan deal got voted in because the majority of Israeli’s wanted to create a peace deal based on the 1967 borders. And the coalition they put together didn’t have the political power to unilaterally do it all at once a after the PLA pulled out of the Oslo Accords. So, they hung their hat on establishing peace in the Gazan strip in a manner that could be a model for the establishment of peace across the region. In the same way that they dismantled settlements and returned oil installations in the Gazan strip to Egypt in search of lasting peace; they did the same to the Palestinians in the Strip.
But unlike Egypt, Gazans responded with neverending war.