I gotta go with Jin on this one. The best definition of "fascism" I've seen is "A governmental philosophy of unitary control by an executive of all governmental, judicial, and economic factors of the country, with little or no regard to legal standards or legislative authority." That's independent of "left" and "right," whatever those terms even mean these days.
Two very prominent forms of fascism are totalitarianism, as practiced by Germany during the Nazi period and most communist countries during the Cold War period, and thugocracy, as practiced by Russia under Putin and, increasingly, the United States under Trump, wherein advancement in the thugocracy depends on:
1. Identifying some action of which you think the bosses will approve.
2. Expending your own resources to accomplish that action.
3. Hoping and working to bring it to the attention of the bosses.
If they approve, you move up, sometimes drastically, with attendant rewards of money and power. If they disapprove, you can end up dead or in prison. If they're indifferent, you do not get the expended resources back.