Fascism is a near-inevitable outcome of poorly checked capitalism, helped along by the poverty arising from it, along with the hierarchical ideals of corporarist environments. So yes, fascism is a symptom, and the cause is not easily solved, so the symptom has to be treated. Education, especially in critical thinking, and ideally before exposure to the fairy tales of popluar religions, alleviation of poverty, and, unfortunately, the culling of those who prove themselves too committed to fascist ideals are all part of the medium term mitigation. Since oligarchs and corporatists tend to resist these things, they have to be counteracted, disconnected from their power base, assets, and financial tools. Since that's also unlikely to happen in North America, we're looking at an unpleasant future.