To take it a step further, what if the Euro style ethnic tribalism could be also decentralized, detached from any one place, to end its effect on geopolitics altogether? Unfortunately I think that'd lead directly to US style political tribalism. We may be forced to pick and choose from having localized tribes vs. politicized tribes.

Maybe if we eliminate states and administrative regions in favour of municipalities only (almost flat hierarchy with just two levels of government: municipality level and EU level), the localized "ethnic" tribes would be a lot weaker.

Like... parallel societies? Separate school, health, monetary systems? That looks like a brewing conflict once there's a conflict in meatspace that can't be solved in such style.

We don't need to eliminate states. We need to bring down remaining empires masquerading as nation states. Russia shall be divided by separating it's ethnic autonomies, Kaliningrad taken away, Crimea given back to Ukraine. Catalonia and Scotland shall be finally granted independence. Bavarian voices are rather silent nowadays, but why not.

The appearance of ostensible diversity, whilst an underlying consensus is actually present. Propaganda exists for a reason I suppose.

I kinda get your point but which system produced fewer wars in the last 250 years?

Seems like they aren't simply mutually exclusive.

Big part of Euro wars were caused partially by multinational empires. WW1 - Austro-Hungary and Russian empire. WW2 - Soviet Union. Yugoslavian wars if in the middle between Serbian chauvinism and Yugo multinational empire as well.

Meanwhile US had plenty of action in this department too.