What Marxist theory have you read to be so confidently wrong? Which liberals understand dialectical materialism? Which liberals study history through the class struggle? Which liberals follow the labour theory of value instead of actual liberal theories like the marginal value.

Liberalism is the ideology of the bourgeoisie and Marxism leninism is the ideology of the proletariat. This was settled a hundred years ago and more, you’re not going to be magically right about it if you insist enough on it.