Nothing makes the left cringe more than libertarianism. Freedom and liberty is the last thing the left wants.
Freedom and liberty are the cornerstones of liberalism. But within a representative democracy where We, the People are the government. That is what our founding fathers created.
Libertarianism and free markets on the other hand sound pretty, but they cannot withstand even a cursory inspection. Libertarianism does not support democracy; taken to an extreme, it entails the law of the jungle. If government never interferes, we could all get away with murder. Alternatively, if the libertarian position is not to be taken to an extreme, where should it stop? What is the difference between no government and minimal government? Attempts to justify libertarianism, even a less than extreme position, have failed. Laissez faire, or free market economics, characterized by minimal or no government intervention, has a history that is long but undistinguished. Just as the negative effects of a high fever do not certify the health benefits of the opposite extreme, hypothermia, the dismal failure of communism, seeking complete government control of the economy, does not certify the economic benefits of the opposite extreme, total economic non-intervention.
"The equal rights of man, and the happiness of every individual, are now acknowledged to be the only legitimate objects of government. Modern times have the signal advantage, too, of having discovered the only device by which these rights can be secured, to wit: government by the people, acting not in person, but by representatives chosen by themselves, that is to say, by every man of ripe years and sane mind, who contributes either by his purse or person to the support of his country." --Thomas Jefferson to A. Coray, 1823. ME 15:482
"The care of human life and happiness, and not their destruction, is the first and only legitimate object of good government."
Thomas Jefferson to the Republican Citizens of Washington County, Maryland" (March 31, 1809).
The selfish spirit of commerce knows no country, and feels no passion or principle but that of gain.
Thomas Jefferson - Letter to Larkin Smith (1809).