Except the convo here is about the general use of the phrase so nah
Also, can we remind ourselves of the exact phrase that MacDonald used please? Talking of river to sea is not uncommon in this context - you can find the same phrasing in the original party platform of the Likud party FFS.
Feel like this analogy might function better if it weren’t comparing the Palestinian people to white power dickheads.
Seems kinda racist imo.