Nationalism is always a problem
Why rampant nationalism should worry us all.
In order to consider this topic, we must first define what nationalism is. Nationalism is the belief or creed of an individual who identifies with their nationality. It is a sense of identity that is tied to a nation or group of people.
The reason this is a problem is because when your sense of identity is tied to a nation, then you are moved to defend that nation as you would defend yourself. An attack on the nation is an attack on you.