There are many legitimate criticisms of Ron Paul, but calling him “isolationist” is simply a misuse of the word. It is either done purposefully to misrepresent and impugn him or out of ignorance. From Merriam-Webster:
Isolationism – a policy of national isolation by abstention from alliances and other international political and economic relations.
Any statement that Paul wants the U.S. to refuse to trade with or engage in economic relations with other countries is nonsense. He is the furthest possible thing from a mercantilist. He is more of a free-trader than any of the other three remaining Republican presidential candidates.
Paul’s position is clear: “Free trade with all and entangling alliances with none has always been the best policy in dealing with other countries on the world stage.” This belief is a rarity in modern politics. Criticize it as dangerous if you wish. Call it foolish. Call it naive. Call it something accurate, but don’t call it “isolationist.”
You may think him an unelectable dogmatic kook. That is an opinion and you can have it. But when you describe actual policy, try not to make yourself look foolish. Use the actual meanings of words.