"Again we have deluded ourselves into believing the myth that capitalism grew and prospered out of the Protestant ethic of hard work and sacrifice. The fact is that capitalism was built on the exploitation and suffering of Black slaves and continues to thrive on the exploitation of the poor - both Black and white, both here and abroad." - Martin Luther King Jr.
"Liberalism", as with most political terms here, is used in an alternate and incongruous way compared to Europe or other places.
liberalism is synonymous with capitalism. they are both authoritarian structurally as they aren't functionally separate. Liberalism/capitalism is a right-wing ideology.
"Libertarianism" suffers similar misunderstanding in the U.S. The term originally referred to what was essentially "communist anarchist" philosophy until a right-wing psyop co-opted the term and now it's understand as such in the U.S. In the UK, Europe, or other places it's sometimes understood under the original meaning.