Fascism is inevitable if the wider people feel poorer and less secure than they want to be. People like that seek to blame others, and that leads to fascism.
To defeat fascism, you tax the rich and spend it on the poor. You eliminate billionaires.
That's the only mechanism that will reliably work over periods of time.
EU; change tactics. Stop walking the USA/UK path. Raise taxes on the rich, spend on your public services. Watch the fascists power vanish.