> EU hate each other

I see how it may look like this from the outside. But I think it would be like saying that siblings hate each other because you witnessed an argument.

Most people in most EU countries consider the other EU countries as allies, even though they don't agree on everything. Now the fact that 27 countries argue means that they talk to each other. I think it's a lot less polarised than in the US. Or course there are extremes too.

The EU needs to be more vigilant than ever, though. Russia has been trying to export their nationalistic totalitarianism to the EU for decades and now the US has openly declared a goal of exporting their brand of blind ignorant nationalism to the EU as well. Both influences will boost alt-right parties if successful. The obvious intended outcome for both powers is a EU that is breaking up from the inside.

On the positive side, this shows that the EU has gained a level of international influence that is taken very seriously by other major powers. It's not 100% certain that it will survive this current wave of assaults, but if it does, it will be even stronger.

I have no idea how you'd measure it, but I suspect Republican states hate Democrat ones more than most European countries hate each other. Listen to the way they talk about California and New York.