Economic globalisation is often associated with the decline of manufacturing in western countries and the associated job loss, while those issues are actually caused by unregulated capitalism (lack of labour laws and no local environmental protections).

It is also associated with some conspiracy theories of Jews secretly running the world.

It's at least partially a biblical thing. "Globalism" is associated with the antichrist in some flavors of Christianity. It's part of what's got some of them convinced that the rapture is due any day now (again/still). Religion is a fucking memetic disease.

War will not end until the planet is united under a single global government. Imagine what humanity could do if we didn't have to spend money on militaries.