In Austria, Haider took over the FPÖ in 1986. In 1999, when Russia was completely weak and had other priorities, the FPÖ already had 26% nationally.

https://en.wikipedia.org/wiki/Freedom_Party_of_Austria

In Germany the AfD rose to around 10% after Merkel let in millions of refugees in 2015. It had nothing to do with Russia at all. It is currently polling around 18% because the economy is bad and people are tired of U.S. subservience and want Germany to make its own decisions.

The concept that right wing parties are somehow beneficial to Russia in the long run is absurd to the extreme.

In Ukraine, literally the Bandera supporters are the best fighters and the most anti-Russian. When in history has it ever been beneficial for a country to support nationalism in an enemy country. It does not make any sense.

This whole thing is just a narrative of the forces who want to keep down "EU-first" movements.