This is laughably false.
The fact that the PLO was trying to achieve a secular democratic state or that they envisioned Jews to live in said state?
I’d love to laugh as well, so it would be helpful if you can be more precise.
Full chant is:
من الميه للميه – فلسطين عربيه
(Min al-mayya lil-mayya, Filasteen Arrabiya)
"From the Water to the Water, Palestine is Arab."