And they have common themes, such as being anti-green. A good commentary on them:
Far-right parties across Europe play on a common theme: Fear
“…Another aspect that is increasingly coming to the fore in a number of these parties and movements is an anti-green tendency. That has certainly been strong in the yellow vest movement in France, which started as a reaction to the higher fuel prices that were part of the government’s climate policies. And recently these issues were important in the strength demonstrated by the Finns Party in the recent parliamentary election in Finland. This also plays on the urban-rural and center-periphery dimensions of these movements. "