Pretty one-sided replies so far so let me just be Devil's Advocate / explain where I'm coming from.
I want to chant things that mean: "Free Palestine", "Stop the violence", "Freedom and Equality for all"
I don't want to chant things that mean: "Kill the Jews"
Do I want to chant "Abolish Israel"... well maybe, I mean it depends on what you replace it with.
"Palestine one and free from the river to the sea" sounds like it is a call for a single arab state and the elimination of Israel, which is bordering on chauvinism.
Or at least that's the other side of it I was interested in discussing.