Solving the "from the river to the sea" debate

In what sense does it "mean" anything?

Since Americans love to do semantics instead of politics, we’ve decided to have an important national debate on what “from the river to the sea, Palestine will be free” actually means. Politics aside, the logic of the debate is completely bizarre. Consider this exchange between Congresswomen Rashida Tlaib and Debbie Wasserman Schultz:

TLAIB: From the riv…