1: Anarchists and democratic socialists literally coined the term red fascism to describe Leninism.

2: Your examples all overthrew the rule of absolute monarchies, neither of which was quite exactly capitalist thanks to the owner class often being nobility.

3: Leaving aside for the moment that post-colonial America would absolutely be considered fascist by modern standards, even as its existence began to solidify the ideology of liberalism, I don't think the meme is literally stating liberalism becomes fascism the moment it stubs its toe.

If anything, based on the characters used, it implies the fight over institutional power as the fascists try to seize control.

And, ironically to authoral intent I assume, Superlib there would absolutely body Homelander lol