Look at the example. See how in a Venn diagram they overlap?
I brought it up because the 3 overlap pretty consistently. If you have a rabid nationalistic, fascist or populist movement chances are it has symptoms of the other 2.
That is not to say that rampant nationalism means fascist. Populism doesn’t mean fascism to your example.
I can’t believe I have to explain this to someone but here we are.