Is this really even debatable anymore? Certainly it's more established than that "Global Warming is caused by humans":
As Gary Tobin observed: "If a majority of faculty said they did not feel warmly about Muslims or Jews or Latinos or African Americans, there would be an outcry. No one would attempt to justify or explain those feelings. No one would say, 'The reason they feel this way is because they don't like the politics of blacks or the politics of Jews.' That would be unthinkable."