If you don't want to call the convergence of these distinctions within certain gene pools race, fine - come up with another word. But denying them doesn't make them go away and opens the door to extremists to exploit them due to the lack of a reasoned response.
To say "there's no such thing as race" will make people think "do I believe you or my lying eyes?" Race is an often uncomfortable reality, but if the facts are acknowledged we will be better enabled to deal with it in an rational and equitable manner.