I think this post summarises how the left have got it so wrong.
Parties like AfD or Reform or National Rally are simply a reaction to many voters concerns about levels of immigration and the how this impacts the host society (pressure on housing, lack of integration, crime or even terrorist attacks).
The left's answer is to dismiss these concerns as ill informed opinions of uneducated white working class racists. Those expressing such views online or through protests should be arrested and jailed. Political parties representing those views should be banned.
By forcibly silencing opposing views the real fascism now comes from the left. By mocking white working classes the real discrimination now comes from the left. And finally by seeking to ban political parties the real threat to democracy now comes from the left.