Israeli residents in Sderot furious with ceasefire and demonstrating in public streets, Netanyahu is being heavily lambasted by other Israeli politicians as well :
This means there was not a clear answer to Egypt from Israel. Hamas and other Palestinian factions want to make sure they are dedicated to a ceasefire and will end any covert ops inside Gaza. There needs to be a guarantee or pledge by Israel that it will abide by ceasefire. There hasn't been, and there are fears Israel will use military force Friday during demonstrations on border(which will continue until siege lifted).
Lieberman says he opposed the ceasefire and is blaming Netanyahu. I think they both know what was going on two nights ago. They were to kidnap or assassinate someone to use as a bargain for their prisoners of war inside Gaza or other purposes. So it's unlikely Lieberman did it on his own. They all knew but it went wrong. If it went right they would have been boasting on Israeli national television.