You know far-right political parties are on the rise in times of economical hardships. And now you have pretty much good conditions for such parties to thrive. The cost of living is increasing every day, the middle class is getting squeezed and their disposable income is getting lower, rents and real estate prices are almost at historic heights.
In such times people are desperately looking for a scapegoat and someone to blame, and those parties are giving them exactly that. They have always been in the opposition, so they feel they are guilt free for the current situation. And people being the irrational beings they are, are looking for a saviour in such "alternative" parties.