At its best, nationalism in some forms can help unify people from disparate backgrounds into an imagined national identity. Unfortunately, most nationalism rots into division instead. Christian nationalism in the US, Hindu nationalism in India, Nazis in Germany. These all reject members of the physical nation in favor of their crazed fantasy version.
All nationalism is brain rot.
At its best, nationalism in some forms can help unify people from disparate backgrounds into an imagined national identity. Unfortunately, most nationalism rots into division instead. Christian nationalism in the US, Hindu nationalism in India, Nazis in Germany. These all reject members of the physical nation in favor of their crazed fantasy version.