Liberal means you support capitalist rule over society, and also their preferred model of governance (bourgeios parliamentarism / capitalist dictatorship) as being "superior" to any alternatives, and especially the existing socialist alternatives.

Also since this model was first adopted by three colonialist western countries (UK, US, and Netherlands) in the 1700s, and adopted by most of western europe shortly after, it mostly coincides with a strong belief in white / western supremacy, as being the only "legitimate" form of governance.

The best book I could recommend here, is Losurdo's Liberalism - A counter history.