Final answer:
The attribute 'Belief in going to war' is not a critical attribute of nationalism. Nationalism mainly involves the promotion of a nation's self-governance, preserving its cultural identity, and accepting individuals into the identity of the nation.
Step-by-step explanation:
Within the context of nationalism, the element that was NOT a critical attribute is B. Belief in going to war. Nationalism is a political, social, and economic system characterized by the promotion of the interests of a particular nation, especially with the aim of gaining and maintaining self-governance, or full sovereignty, over the group's homeland. The critical attributes of nationalism include A. Belief in freedom from foreign rule, which refers to the desire for self-determination and independence; D. Belief in preserving cultural identity, which encompasses the importance of upholding and celebrating a nation's cultural heritage; and C. Belief in accepting everyone, which, in some concepts of nationalism such as the French model, implies that anyone who pledges allegiance to the state can be included in the national identity.
While nationalism can sometimes lead to conflicts when a nation feels it must defend its sovereignty or interests, going to war is not a fundamental attribute or goal of nationalism. Instead, it's a potential byproduct of extreme nationalistic sentiments. Nationalists often emphasize peace, unity, and mutual respect for other nations while focusing on internal solidarity, culture, and self-determination.