I know it always supports big business. And it’s a reactionary force that people in power turn to when things go badly for the workers and they think of revolt.
But fascism also demands genocide and killing of millions of people and that would only hurt the capitalists, no? Because these are people who would otherwise be working and increasing profit used to increase productivity etc etc etc. But if you kill them you reduce the labor force and thus drive up the price of labor, reducing your profits, and thus what you can spend on improving productivity? And other countries which didn’t do so would become more advanced, leaving you behind.
if social democracy is the carrot, fascism is the stick. It's still capitalism, just capitalism at total war with the revolutionary proletariat. It can only do this by running a permanent (until it caves in on itself) wartime economy and squeezing the labor force for more than it can bare.