fascism

Well, this is the definitive source, yes

The P³’s definition of fascism:

I used the version used by the Holocaust Museum.

Ah, yes, that one:

The claim in the Instagram post about the poster’s ties to the Holocaust Memorial Museum is MISSING CONTEXT, based on our research. While a poster with the “Early Warning Signs Of Fascism” was indeed previously sold in the U.S. Holocaust Memorial Museum Shop, it did not originate from the museum and was not part of any exhibition or display. Britt wrote the words in a 2003 article in Free Inquiry, which Syracuse Cultural Workers reprinted and sold with his permission.

As in, “Keep Calm and Carry On” is authenticated by WH Smith’s selling a postcard of it.

The actual Holocaust Museum definition of fascism is:

Definition and Beliefs
Fascism is an ultranationalist, authoritarian political philosophy. It combines elements of nationalism, militarism, economic self-sufficiency, and totalitarianism. It opposes communism, socialism, pluralism, individual rights and equality, and democratic government.

Fascism places the importance of the nation above all else. The unity of the national community is prioritized above the rights of individuals. This leads to an intense interest in defining which groups belong or do not belong to the national body. Fascism is characterized by:

strident, often exclusionary nationalism
fixation with national decline (real or perceived) and threats to the existence of the national community
embrace of paramilitarism
In fascist states, violence is accepted—even celebrated—if it serves or advances the national community. For fascists, violence often has a redemptive or purifying quality.

Fascism rejects the practices of representative or liberal democratic government. It holds that these practices interfere with the expression of the national will. Instead, fascist governments are one-party states led by an authoritarian leader who claims to embody the national will. Fascists define the national will as advancing the interests of the national community. This usually means:

protecting or elevating the rights of the national community above the rights of those seen as alien
removing obstacles to national unity and suppressing those seen as challenging it
expanding the size and influence of the national state
often, also seeking to expand territory through armed conflict

A rather more worrying list both for the P³ and his mates in the SNP.