You can have wildly differing viewpoints inside a culture. A democrat and republican can be further apart than an american and a frenchman. Culture and identity

You can have wildly differing viewpoints inside a culture. A democrat and republican can be further apart than an american and a frenchman. Culture and identity are complex phenomena. You cannot reduce a person's identity to a single label without removing almost every aspect about them. A global culture would be a baseline for mutual understanding, but it would not cause homogenous identity anymore than a person's citizenship does.