Those arguments that Jonathan Cristol raises might be relevant reasons against Palestine seeking UN membership, to be balanced against other arguments tending the other way.

But that's a matter for the Palestinians, and while there are those among them who oppose this move (notably Hamas, who see it, justifiably, as involving a fuller recognition by Palestine of Israel's sovereignty over most of what Hamas sees as Palestine), the bid appears to have widespread support among most Palestinians.

But these arguments are not relevant to the question whether it is justifiable for a small minority of states - basically the USA - to block this membership application.