1. You don't confuse between the idea of free market and (US) government intervention.
For example: The US sanction against Iran, that our philosopher condemn as raising oil price at the cost of oil importer countries, is not a free market idea. It is a government (political) intervention.
2. You don't set double standard.
If you condemn the US unfairly manipulate its exchange rate (which I don't get why, because the US is also major importer), you should also applies the same level of condemnation against China.
.. and more to come