The reason they might currently feel differently seems pretty obvious to me, even though this is a topic I rarely ever think about.
David Ben-Gurion, 1937
There is no contradiction.
"From the river to the sea", in English, means something different from "at the river and at the sea".
> ... the Palestinians and Palestinian organizations - even including Hamas - have to varying degrees accepted or shown willingness to accept a Palestinian state that does not encompass all of Mandatory Palestine.
you say
> This cannot be reconciled with the meaning of the slogan "from the river to the sea".
To which I quote
> "You can draw a straight line through two points, but that doesn't mean the line is actually there."
Also, at what point in history has Likud not used this slogan?
https://www.jewishvirtuallibrary.org/original-party-platform...
https://archive.is/EYGLU#selection-423.0-423.184
"The coalition agreements state that “the Jewish people have an exclusive right on all the land” between the Mediterranean Sea and the Jordan River. It doesn’t mention the Palestinians."
Which they tried in 2005 in Gaza. They evicted the remaining settlers in Gaza and unilaterally withdrew from Gaza.
Hamas won the first and only election thereafter and ruled in Gaza from that point on.
In the years during and after the pandemic, Hamas deceived Israel in the way it presented itself. An IDF report assessing the massive intelligence failure on Oct 7 reported [0], "Israel saw Hamas as a pragmatic movement with whom it could do business." That was a tragic mistake.
The opinion of the Israeli public towards the desirability (and feasibility) of a two-state solution has tended to vary over the decades depending on the actions of external Palestinian and Arab actors. After the wave of Palestinian suicide bombings of buses and restaurants starting around the year 2000 it went down. Two years after the Gaza withdrawal it was back up, with 70% support for the two-state solution in 2007, when there were peace talks. [1]
The mass killings and kidnappings that Hamas did in 2023 pretty much eliminated any enthusiasm for two states at present. A recent poll put Israeli opinion at 70% opposition to a Palestinian state.
That could change again. Israel is a democracy, and people vote depending on what they see. The idea that a Palestinian nation will ever encompass "the river to the sea," is a complete delusion. The idea that Israel will ever see peace and security by annexing the entire area of the former British Mandate is likewise a complete delusion. If Hamas can be defeated, if the Palestinian Authority can get more effective, less corrupt leadership, if Israel can get a parliamentary majority that is no longer dependent on right-wing parties, if ordinary Israelis can get a hint that Oct 7 is not something that will happen again, then there might be hope for peace.
Y'all do want peace, don't you?
[0] https://www.ynetnews.com/article/bkd8rnrqkl
[1] https://www.jpost.com/arab-israeli-conflict/with-only-40-per...
Also the sentiment of the population does not matter if the government does not want a two state solution or only on conditions unacceptable to the Palestinians. Read up on the details of the proposals.