Just to be clear. This is my personal opinion. I am not trying to push my beliefs onto you. My main goal is to make you think about the topic.
Patriotism is bad for humanity. There is no way about it. By definition patriotism is an ideology of attachment to your homeland, culture, ethnicity, history and so on. At first it may sound like a neat idea, but the more you think about it the worse it gets. And now we are going to think about it.
Let us start with a simple and some what cliche example. Imagine there are two individuals in their mid 30s. Both educated, well mannered and highly patriotic. Imagine them having a discussion about patriotism and their homelands. It most likely is a mutually respectful and generally nice conversation. Now imagine those same two people, but with a little bit more context. First of them is an USA citizen, the other one is German. Their interaction is taking place during WW2. Both individuals have lost some family and friends to the other side. How are they interacting now? Most likely they’re both extremely hostile. My point is: there’s a fine line between patriotism and chauvinism. And the line is context.
Life in a way is context, you take some event like the first scenario mentioned and it becomes a lie, an illusion in comparison to the second scenario. What patriotism does is it manipulates the context to the point that people feel they are on the right side when they’re harming others. Now take patriotism out of the equation. There are no more sides, interactions are based on pure morality of humans that are interacting. I firmly believe that the people who would take a life of an “enemy” wouldn’t do it if the decision would be made by their moral compass instead of political views and in a way patriotism.
And this is what patriotism does. It clouds our minds if the circumstances change. It lets us rely on something else that our morality to make decisions. Humanity isn’t evil by default. We are born good and we should be good to everyone. There are on races. There are no nations. We are all human. Let’s act that way.