With who, Iran? He doesn't seem to be too fond of trade with Israel.
Free trade refers to the power of a free market to provide compelling reasons to pursue peace rather than war. Paul obviously feels it has to be adjusted to adequately deal with what he sees as impediments to this free trade process. I am not supporting any particular adjustment he feels is necessary - I'm just saying that he's pushing, overall, for trade as a war replacement power, versus socialism.
That's a cheap shot. Just because Ron Paul doesn't believe in foreign aid to any countries including Israel, doesn't mean that he harbors some sort of dislike for them.
That is the same argument as, What you don't believe in welfare? Why you must be a racist!