We've all got preferences. When Brian Sell was closing in on Alan Culpepper at the end of the Boston Marathon I was really hoping that Sell would pass Culpepper. Anything against Culpepper? Not at all. I admire him and wish him well. But Sell grew up about 35 miles from where I did, ran for a high school that I occasionally competed against while I was in high school, was, like me, not a high school prodogy and went to a small college that I occasionally competed against and that happens to have been my dad's alma mater after transferring there from a different small college that I used to race against quite frequently in college. So I felt a certain affinity for Sell.
Scott's expressed a preference here, that's all. He didn't say that naturalized citizens should be ineligible for records. People may disagree and have the right to do so. But to call Scott xenophobic or racist for expressing an opinion like he did is way out of line.