Karl Marx celebrated liberalism’s achievements, such as freedom of the press, while excoriating its fidelity to private property rights. We can hold the same tension in our minds — fiercely opposing capitalism while fighting to make liberal rights real through socialist transformation.
And his take was that liberalism was the half delivered promises of the enlightenment. Or did Engels say that? Actually I think that’s an Engels paraphrase from his writing on historical materialism. Either way tho