You're right it's not an issue, but Rachel Maddow and Chris Matthews know that Ron and Rand Paul will tell the truth so they make it an issue so that they can paint them as racists.
If you think Ron Paul would close off trade with China then you don't know him at all. Ron Paul is for completely free trade with everyone. It's the interventionists who want to go around drawing lines in the sand with foreign governments, not Ron Paul.
Seriously you aren't talking to someone who "hates" Ron Paul. And neither, I suppose does Maddow or Matthews. But if it was that easy for them to get both Pauls to paint themselves into a corner..how do you think it's going to go on an international stage? The world is a wild and wooly place.
I don't want to see a Nader or Kuncinch presidency for very much the same reason. While I like Ron Paul's stance on many things..I recognize that as President..you MUST be flexible.
And I don't see that in Ron Paul.