This feels like an appeal to authority. He's an economist, not a political scientist. His Nobel prize was in contributions around screening, which is important but has jack shit to do with fascism. And he's held some opinions before that were highly controversial to say the least, like advocating for the breakup of the eurozone. Just because he says it and he has a shiny prize doesn't mean it's right.
First, the definition of appeal to authority, since it's one of the most misunderstood fallacies. Citing someone based on their area of expertise is not appeal to authority. The problem is when you cite the stated opinion of someone, but their area of expertise is not directly relevant to that opinion. I'm a software developer, I could give you an expert opinion on various topics in that area. But outside of topics I am an export on, appeal to authority.
I didn't say he's necessarily wrong. But at the same time, he got his Nobel prize by being an economist who made a substantial contribution to economics. He is not an expert on fascism. His expert opinions in economics often run counter to many other credible expert economists, so you should consider those other expert opinions as well and not just listen to the person who tells you want you want to hear. That's certainly not anti-intellectual.
Experts and intellectuals should absolutely be considered to better understand a subject, but they're not some infallible oracle of truth. They contradict each other, are often limited by an ivory tower environment, and operating in the same societal context as everyone else.
But it seems it takes one of their own for them to maybe potentially consider the possibility that there might exist some specific corner case in which they might need to ponder the necessity to listen. And even then, economics reductionists will still pretend it's suspect.