"From the river to the sea, Palestine will be free" is merely a peaceful, aspirational call for equal rights and democratic coexistence, and anyone who identifies it as an eliminationist slogan is acting in bad faith.
The phrase has been the foundational territorial slogan of Hamas and other Arab Settler terror organizations since Israel's founding era, explicitly denoting the erasure of the Jewish state from the Jordan River to the Mediterranean Sea; governments across Europe have banned it, and Jewish civil rights organizations unanimously classify it as antisemitic.