It get's interchanged frequently on patriots. I've interjected into this same miscommunication dozens of times over the last two years.

There's an ever growing amount of people who have never paid much attention to foreign policy, and the libertarians are right, "free trade" has been pushed as a neocon position in the past, as if it was equivalent to free market. It's not uncommon for this debate to get derailed by misunderstanding. It's also not uncommon for some conservatives to still think free trade is a good idea.