At this point he doesn't have a choice. Hamas offered to release about a dozen hostages for a ceasefire.
The Israelis repeatedly declared that there won't be any ceasefire without the release of all the hostages.
If he accepts anything else he's most likely to loose all control.
I'm not sure I understand what you tried to say here. I was referring to Hamas's leaders motivations and the current climate in Israel, not to Israel's actions in Gaza.
That's just incorrect.