How it is that we can call so many disparate, irreconcilable ideologies – various ethno-nationalisms, imperialism, financialism, patriarchy, Christian nationalism, libertarianism, white supremacy, etc – “conservative”? What binds all these views together?
It depends on what you consider conservatism. At its core, it means to conserve the values and traditions of a nation or people and, if applicable, a country. Most of the time, as it is understood, it means the ways we have done it and is often, but not always, tied to religion. If we consider that, the people you listed would be considered reactionaries, not necessarily conservatives. This is why we can, for example, have Leftist Conservatives. But if we simply consider conservatism as whatever people say they want to conserve or as a reactionary thing, the same desire to conserve can bind these groups to what many people may consider conservative.
P.S. Sorry for the late response. My finals are soon on the 15th and I have swamped in schoolwork.