"From the river to the sea" is a literal call for Israel to be ethnically cleansed. Both sides want to kill each other very badly, only one side has the capability at the moment.
as interesting side note:
geographic "from <> to <>" slogans are very commonly used in such contexts. Basically you take a are geographically split into multiple regions, make a "from->to" slogan which treats this areas as one unit in between and imply through it that it should be all homogeneous (weather it's about country boraders or ethnicity)
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Like e.g. the German national anthem is based on a song from 1841, i.e. it predates WW1,2 and in turn the current German border.
Due to this the first verse refers to boarder rivers which by now lie outside of Germany (and and has other issues related to sever misinterpretation of most of the verse).
This lead to it being abused by Nazis and later neo-nazis to mean Germany should go to war and size various border regions.
But Germany did need a national anthem and this song has a lot of important history meaning unrelated to WW2/Nazis. So west Germany decided to make it the anthem again, but only sing the 3rd verse for official occasions. Through due to continuous abuse of neo-nazies of the first verse this was changed with reunification and today only the 3rd verse is the official national anthem.
Anyway I got a bit off topic but "from <> to <> verses" crossing country boarders (or "ethnic" boarders if used in some "ethnic" context) are most times "pretend to be harmless" slogans of extremists, even if they have a history where they had other meaning (like with the first verse of the song the German national anthem is based on).
Maybe. Though you have missed out the second part - which doesn't talk about cleansing - it only talks about end of occupation.
Only one side is an illegally occupying power who took the land by force from the people who were peacefully living there.
And don't quote me events from ~2000 years ago.
If everyone held grudges that long the whole world would be at war.
The people in the West bank currently being driven from their homes - they aren't a threat to Israel - they are just farmers working their land. Trying to pick their olives.
It's a false equivalence to say there are two sides, on the one hand and the other.