You’re very, very mistaken. Liberalism, by definition, is not a rightwing ideology at all. That’s just factually wrong.
economic liberalism’s main idea is to reassure one’s right to a private property. another one of its basic premises is for the government not to interfere with the economy, allowing the market to be as free as possible. that is absolutely a right wing ideology. it allows the entrepreneurs to explore the working class, in fact i’d say liberalism almost encourages it to happen. it is a rightwing ideology.