nationalism

noun
1
the desire by a group of people who share the same ethnic group, culture, language, etc. to form an independent country
ملی‌گرایی, ناسیونالیسم, ملت‌گرایی
2
a feeling of loving your country very much and being very proud of it; a feeling that your country is better than any other
میهن‌پرستی, ملی‌گرایی, تعصب ملی
The war was fuelled by aggressive nationalism and feelings of cultural superiority.