Oh please!
IMO, a waste of time... and harmul!
Even a Goyishe Kop understands the argument of Peh SheOsar hu Hapeh Shehitir.
If our legal rights boil down to United (abomi)Nations ratifications, then everyone knows their current stance.
This is like arguing to that Israel's right to exist is protected under Iranian law, being that Iran and Israel had close diplomatic ties before the revolution. Who in the world would fall for that?
The only (ideological) argument is indeed the one that goes back to Abraham.