That's kinda the opposite of being religious no?
Not really. Although there were religious fascist, the state used it to try to control the mass.
That's exactly what is happening in Europpean country. For example Cryptofascist far right party are using the so call christian foundation of the country to estinguish Muslim and Islam.
Fascism is rooted with the hate of everything different from what it deems to be the norm and will therefore use everything, even religion and twist its usage to repress other confession.
Its important to note also that fascism is an adaptative movement. Meaning that it will grow in different form alongside different ideologies. You might wanna search the term "clerical fascism" which is something that grew with Mussolini and less with Hitler.
But in anyway. You don't have to understand the point : "religion and state interwined" as we saying that fascist are always religious. The point is that fascist will have not problem to use religion or its spreading to control the mass and oppress minorities.