Sure, the Lurias and SA could go south but to what gain? If the 'Moot can't take care of themselves why should others bother helping them? I don't believe a Crusade will be called.
I dont know If a crusade would be called, but i could imagine it happening.
Atleast from my characters perspective it would.
The Sa would definatly gain alot from a crusade colony in Chesney.
A. To gain of a first theocratic stronghold on the marocidens and the south
B. Efectivley destroy or convert the heathen scum, heatens are bad, mkay.