Hasn't black nationalism been essentially dead since the Black Panther party collapsed? You talk about as if it were as immediately dangerous as white nationalism, but I'm not sure it is.

It isn't, but pretending that 70s Kodachrome black nationalism is the same as 1080p60 white supremacism is a useful lie as long as you're talking to somebody who doesn't know any of the history involved.

I'm not convinced that nationalism not based on some intrinsic attribute of its people (like race) is even mostly bad.

1. : loyalty and devotion to a nation especially : a sense of national consciousness (see CONSCIOUSNESS sense 1c) exalting one nation above all others and placing primary emphasis on promotion of its culture and interests as opposed to those of other nations or supranational groups

This, to me, reads that nations should advocate for their own interests first and have that as their primary concern - which seems pretty reasonable. Much in the same way that we have state and local representatives that advocate for the state and the locality in their respective governments, the higher levels up do the same for their entire citizenry on the global stage.

There's nothing inherently icky or oppressive about this kind of mutual self-interest, and it need not imply any kind of dehumanization. It is, of course, possible to take too far (see: xenophobia), but that strikes me as a problem of implementation and general human failings, not as an intractable problem with the concept that deserves it being compared to objective evil.

If the antonym of nationalism is globalism, I think that mindset has bigger problems.

It's curious that people that seem to be racists aren't happy when everyone tries to get along and sing campfire songs about being one people and inclusive. They also aren't happy when people stand up for themselves and reject their worldview.

From a pure strategy perspective I suspect you never want to be the last person to adopt tribalism.