If we negotiate with Hamas, where does it stop?

On September 1, I emailed my cousin in Israel about the six murdered hostages. I texted my thoughts glad that she and our extended family were not among them. Her reply somewhat surprised me by her bluntness that Bibi and his gang were totally to blame and that everyone in Israel is family. I too am not a Bibi fan, and I don’t have family being held hostage by Hamas. But  if we negotiate with Hamas where do the events of October 7 stop being repeated because we reward Hamas?