The Frumguy – so we do see though that you can have kedusha in Chu”l which seemed to be your original objection, as you wrote, “How can they really apply the same term to Chutz La’aretz where our Chochamim have decreed Tum’ah?”
But we still don’t have an answer regarding whether or not Kivrei Tzaddikim can be called Mekomos Hakedoshim. I do agree that it sounds funny to call a place in chu”l a makom kadosh, but that is just my feeling and I don’t know if it’s true or not.