It's important to first define fascism. John T Flynn, a left wing American and critic of FDR, was a contemporary observer of fascism and wrote a 1944 book "As We Go Marching" about fascism. This is an excerpt:
Specific instances of fascism in America today are:Fascism is a leftist product — a corrupt and diseased offshoot of leftist agitation...
1. In which the government acknowledges no restraint upon its powers — totalitarianism
2. In which this unrestrained government is managed by a dictator — the leadership principle
3. In which the government is organized to operate the capitalist system and enable it to function — under an immense bureaucracy
4. In which the economic society is organized on the syndicalist model, that is by producing groups formed into craft and professional categories under supervision of the state
5. In which the government and the syndicalist organizations operate the capitalist society on the planned, autarchical principle
6. In which the government holds itself responsible to provide the nation with adequate purchasing power by public spending and borrowing
7. In which militarism is used as a conscious mechanism of government spending, and
8. In which imperialism is included as a policy inevitably flowing from militarism as well as other elements of fascism.
"As we go marching to the salvation of the world," Flynn warned, "government power expanded, our economic and social life was militarized, and we were coming to resemble the very dictatorships we were fighting."
1. The minimum wage law
2. The Gun Control Act(GCA) of 1968
3. Attacks of Freedom of Speech in particular and the Bill of Rights in general (constraints to totalitarianism)
Importantly, totalitarianism centrally relies on the gun control and arms not being in the hands of the people, because as Mao said: Political power grows out of the barrel of a gun
So anyone who supports gun control (including existing GCA), minimum wage laws, and attacks Free Speech and the Bill of Rights should rightly be called out for supporting key elements of fascism.
True anti-fascism is supporting Free Speech and the Bill of Rights, especially the 2nd Amendment which is the ultimate safeguard. True Anti-fascism is the repeal of the GCA, a rejection of calls for massive increases in minimum wages, and non-interventialism.