[lukan]

Hah, as if the fascists themself are in loving unity. (Or clear on the term itself)

There were and will be opposing voices also in deepest fascism.

More broadly, totalitarism is rather the term, where the whole society is total under control of one ideology. That can be fascism, but also other ideologies strive for that.

But yes, allowing anonymous voices is one way to counter it.