Capitalism is financial, fascism is political. They can be concurrently implemented.
I think the argument is that economics and politics are not independent of each other. They are two sides of the same coin. Whomever controls the food supply has power over the population, which means it has political power. Whomever has power over the population, has power over the food supply. Basically, economics and politics are different perspectives on power.
For example, the political structures in the West create the rules over who gets to obtain power through the economy. From the other direction, the people with economic power get to control who gets to obtain power through the political structures.
Definitionally, anything that prescribes the way things are to be distributed is political. There has been a desensitization to the word politics with an ever present right using words loosely adjacent to their true meaning, but capitalism is inherently political. Now it’s a bit of a chicken and egg problem with western democracies kinda being formed around it, but that doesn’t make it any less true. I sincerely doubt anyone would argue communism or socialism aren’t political because they are economic theories.
You can’t meaningful separate these. Sure, capitalism is not mutually exclusive to say parliamentary democracy or dictatorship or monarchy, but you need a state that enforces the “will of the market”. Capitalism values property very highly. That’s a political decision. It allows a very hierarchical relation between workers and bosses by enforcing the property laws of the latter. At the end of the day, it’s the police (and therefore the state) that evicts you, not the landlord and not the market.
It’s an economic system that seeks to control the political system enough to further itself with no thought or care for anything that doesn’t fit that goal, in the same way a malignant cellular mass seeks to control the host environment enough to further unrestrained and out of control growth. Both kill the host.
