A true spiritual person is not attached to a country.  -Vivekananda

Nationalism and Spirituality cannot coexist.

Spirituality cannot coexist with any 'ism'. Truth transcends boundaries. True saints don't believe in man made boundaries.

In the image there are countries that believe their culture is superior to others. 

Only Spain is less superior and so Finland is not the only country with these kind of feelings.

This behavior is called Ethnocentrism

https://en.wikipedia.org/wiki/Ethnocentrism

Ethnocentrism in social science and anthropology—as well as in colloquial English discourse—means to apply one's own culture or ethnicity as a frame of reference to judge other cultures, practices, behaviors, beliefs, and people, instead of using the standards of the particular culture involved. Since this judgment is often negative, some people also use the term to refer to the belief that one's culture is superior to, or more correct or normal than, all others—especially regarding the distinctions that define each ethnicity's cultural identity, such as language, behavior, customs, and religion.[1] In common usage, it can also simply mean any culturally biased judgment.[2] For example, ethnocentrism can be seen in the common portrayals of the Global South and the Global North.

Ethnocentrism is sometimes related to racism, stereotyping, discrimination, or xenophobia. However, the term "ethnocentrism" does not necessarily involve a negative view of the others' race or indicate a negative connotation.[3] The opposite of ethnocentrism is cultural relativism, a guiding philosophy stating the best way to understand a different culture is through their perspective rather than judging them from the subjective viewpoints shaped by one's own cultural standards.

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Each nation feels superior to other nations. That breeds patriotism - and wars.

https://www.socratic-method.com/quote-meanings-interpretations/dale-carnegie-each-nation-feels-superior-to-other-nations-that-breeds-patriotism-and-wars/

Only through empathy and an acknowledgment of our shared humanity can we hope to transcend the cycle of wars bred by feelings of superiority and patriotism.In conclusion, Dale Carnegie's quote encapsulates the complex relationship between feelings of national superiority, patriotism, and wars. By introducing the philosophical concepts of moral relativism versus moral absolutism, we gain a deeper understanding of the underlying psychological dynamics that drive conflicts between nations. It calls for reflection and introspection, urging individuals to embrace patriotism without falling into the trap of exceptionalism and to strive for empathy and understanding in order to break the cycle of war. Only then can we truly build a world that values peace and unity over division and conflict.

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What if the world was one country? A psychologist on why we need to think beyond borders

https://theconversation.com/what-if-the-world-was-one-country-a-psychologist-on-why-we-need-to-think-beyond-borders-152135

There are countless different species on the surface of this planet. One of these is the human race, which has over seven billion members. In one sense, there are no nations, just groups of humans inhabiting different areas of the planet. In some cases, there are natural borders formed by sea or mountains, but often borders between nations are simply abstractions, imaginary boundaries established by agreement or conflict.

Rusty Schweikhart, a member of the 1969 Apollo 9 space mission, explained how when he looked at the Earth from space, he experienced a profound shift in perspective. Like most of us, he was brought up to think in terms of countries with borders and different nationalities, but seeing the world from this new angle changed his view. He felt “part of everyone and everything”. As he described it:

You look down there and you can’t imagine how many borders and boundaries you cross, again and again and again, and you don’t even see them.

Schweikhart’s perspective reminds us that we belong to the Earth rather than to a nation, and to a species rather than a nationality. And although we might feel distinct and different, we all have a common source. Our species originally developed in eastern Africa around 200,000 years ago and migrated out into the rest of the world in a series of waves. If there was an ancestry website that could trace our lineage back to the very beginning, we would find that we all have the same great-great (followed by many other “greats”) grandparents.

How then do we explain nationalism? Why do humans separate themselves into groups and take on different national identities? Maybe different groups are helpful in terms of organisation, but that doesn’t explain why we feel different. Or why different nations compete and fight with one another.