The problem with the material is WP:NPOV and WP:UNDUE.  There is also no reliable sourcing to say that this is significant to Palin's biography.  I generally tune out after hearing someone complain about "whitewashing" and this is no exception.  Accusations of bad faith (being a "Palin supporter") and threats to edit war / retaliate are rather disruptive.  This seems to be a WP:SPA editing wikipedia solely on election-related articles.  If the brief description of the AIP is inaccurate please feel free to write a better, succinct identification of the party.  However, an extended description of the platform of a party this person left 12+ years ago is unwarranted - seems like an obvious coatrack.  Again (per my comments above), if the mainstream, reliable sources begin to say this is a serious scandal we can report it as such.  In the meanwhile a reliable source here or there does not mean it is a significant issue to her biography (particularly not considering that there is a separate article about the party, and yet another article about her political positions).  As of this moment there seem to be 36,000 current google news stories about her, and only 13 mention the AIP.  That's a very cursory analysis but it supports what seems to be the weight of the sources - it is simply not a big issue.  It may be soon, but not now.