Is the United States really interested in a liberal (democracy) hegemony?

In the videos below, John J. Mearsheimer claims that the United States is interested in promoting liberal democracies in the world (i.e., liberal hegemony). I would qualify this in the following way. Promoting liberal democracy is a sufficient — though not a necessary condition — for promoting an American capitalist hegemony. Why? Because the sort of “liberal democracy” which the capitalists want is where there is a president or a prime minister — a single individual who can be bribed or threatened, and who can be helped to be elected. The United States is not interested in promoting Swiss style democracy, for example. And, moreover, for capitalist interests, promoting dictatorships is also a sufficient — though not a necessary condition — for promoting an American capitalist hegemony, as long as the dictator cooperates with the American capitalist hegemony.

The rhetoric of liberal democracy as promoting individualism, inalienable rights, tolerance, community, and peace is a rationalization (a smoke screen) for promoting capitalist interests.

John Mearsheimer assumes that countries like the United States operate on the basis of ideologies. On the contrary, countries like the United States reflect the interests of a President and his friends. Ideology is a propaganda rationalization or smoke screen for economic reasons.

Bush’s invasion of Iraq was for control of oil and for a depletion of United States’ surplus of armaments; not for liberal democracy. And Trump’s saber rattling over Venezuela and Iran has nothing to do with promoting liberal democracy. It may be just a strategy for securing his reelection. I find it odd that Mearsheimer ignores the deeds of single leaders with their private interests.