I've looked a bit into it, and the term used to have a city disappear upon culture flippingg is "disband", not "raze".
Well, imagine an Aztec settler is sent by Montezuma to settle on a hostile desertic hill for no other reason than to encroach Summerian lands and steal them a copper source. A couple years decades later, the city is but a pile of rags and rocks, and their few inhabitants are starving and jealous of their prosperous Summerian neighbours. Naturaly, they turn to Gilgamesh and ask to join his folks.
Gilgamesh has 3 options, tell me which one is the good one, as a peacemongers :
- Yeah sure, come in. I'll let my people starve and my city dwindle so as to turn your pile of rock of a city into a slightly bigger pile of rock.
- Yeah sure, come in. Jk, just kidding, here slave whipper tyranic warmonger Monty, take control of your folks back, and don't forget to slaugther mine once you'll have copper weapons.
- Sorry, lad, I can't do anything for you.
And in case of 3, is Gilgamesh really responsible for the disbanding of a poorly placed crappy city over which he never even wanted to assume authority?
For flipping bigger cities, or cities that are not encroaching, I totally get that 1 or 2 should be prefered and enforced (and rephrased, as in 1 you really have no reason of discontentement keeping the city, and for 2 you're more likely to be the douche than your neighbour), but I can see cases where even from a RP perspective as a peacemonger, the disband option is preferable (btw, these are exactly tthe cases the disband option has been designed for).