Guess it depends on your definition of fascism, because they don't really care about any kind of racial or national chavinism outside of unity of the state and opposition to liberal capitalists.
I don't think any modern day fascist would be down for a synthesis of Islam and Christianity, but that's one of Dugin's geopolitical proposals. It's like Stalin and Evola came up with an ideology. I wouldn't call them enemies though because it's not as if they aren't leftists, it's just that most of us conflate some of their views and their school of thought with fascism although its something entirely different that I think needs some degree of respect.
Thing is a lot of nazbol types on the internet today are basically strasserists who are JEWS = CAPITALISTS LOL who are just nazis that believe in more economic centralization and the erasure of classes. Imo anybody who is economically left should have a place here and we shouldn't have an extremely specific party line for what is tolerable and what is not.