Also not new, been happening for as long as I can remember. Nordic Resistance Movement for example been around since late 90s, and early 2000s they were already banding together with other organizations in the Nordics, and even collaboration with their German counter-parts and more.

From the top of my head, Franco, Hitler and Mussolini frequently helped each other, two of them even created a somewhat famous alliance together, even though by their own "theories" they should have been fighting against each other instead.

I'm sure there are even more examples further back too.