Even if they did seek out allies, those other allies might very well refuse to join in on such a war because they personally do not stack up against the opponent, even if together the allies might stand a chance. but will they? Often the AI is reticent to attack someone who is militarily more powerful than itself, and it there is no such thing as seeking out allies to attack. The problem with the Infamy system in Vanilla Victoria II is simple: once you raise above the 25 infamy barrier, other great powers are free to attack you with the Containment wargoal.
A World War 1 American propaganda poster.
