There is an observed disconnect between the Israeli and Palestinians sides here that is very dangerous, but it's not even new – these nations are joined at the hip through the conflict, and yet both tend to act and think as-if they do not need to understand and take into account what is actually going on with the other party. These societies don't know nearly enough about each other already. Of course, with the absolute power discrepancy between the sides, it matters way more how the Israelis fail at this. The responsibility falls on Israel, because Israel is the party that has had the means to create the perverse situation that a generation of Gazans have already grown that has never personally seen an Israeli.
The other Israeli perversity is how it managed to kill its own peace movement. Israelis sometimes refer to the deal offered by Ehud Barak. Which wasn't bad, where israel was offering to actually give real things up, and concede them to the Palestinians. And then the Palestinian side refused it.
And it turned out no one in Israel had really stopped to think aboiut whether the Palestinian side was anywhere NEAR an internal political situation where they COULD take such an offer (no right to return being the sticking point). The Israelis had NO IDEA what the situation was on the Palestinian side, and had not even stopped to think beyond the assumption that whatever Israel offered, the Palestinians would just accept – because the Israelis considered it reasonable. And the shock of this outcome on the israeli side was so great, the Israeli peace movement pretty much just laid down and died from it.
So why should the Israeliis know and care about what goes on the Palestinian side, and vice versa? Because unless the objective on both sides really is just the eradication of the other – no need to know anything about them then of course – then it is necessary to know what is going on with the other party, including what symbols, signals and slogans (like the river to the sea here) signifies to the other party. It is just not going to be possible to get meaningful negotiations without it. (But of course those do not want negotiations might adopt a maximalist attitude because it is fit for purpose to avoid having negotiations.)
Anyone can then think some of these responses overblown and irrational, maybe try to argue about them given the opportunity, but demanding some kind of absolute right to willful ignorance about their significance to one side or the other isn't really something than can claimed in good faith.