or maybe not...
i tested it. in this game, HC was the only one without any buddhist cities. i went into WB, gave him buddhism in one city, so now he's a voting member, but he did not convert. in WB i had Miss B declare war on him again. i then hit shift enter a bunch of times until a vote came up to see what options i'd get. during that time, Wang Kon offered me a DP, i declined, and the very next turn he declared war on HC. ummmm, wang honey, that would have cancelled the DP ya know?
first things first ... during the shift-entering i got a great random event, +1 hammer to the forge in my capital, that i probably won't get when i go back and really play, so you owe me one
.
the results ...
the votes i could pick were:
there's no option there for everybody to pile up on HC, who is now a voting member. there definitely was an option "declare war on Huayna Capac" back when he was a non-member during the first war Miss B declared on him.
i don't think that the fact i WB'd the declaration of war futzed with the results, because in between that time and the turn i could call a vote, Wang declared on his own, without any WB-enhancement from me. but i include the info about how i set it all up in case that does alter the results in any way.
the wording in any event is at the very least confusing. "stop the war against Wang Kon" ... this is a war he declared maybe 3 turns ago. i'd not exactly call that a war of aggression some big meanie is fighting against him *boggle*. and the civilopedia made me expect to see "everybody pile up on good ole' punching bag HC" pop up as a voting option, but it ain't there.
i suppose it could matter whether the wicked heathen declared on the poor innocent true believer vs the true believer declared on the heathen? that's not mentioned anywhere in the pedia tho. i'm actually not sure who i had declare the war in my testing, and since i did it in WB the event log doesn't have a record of it, it was just magic.