The data are on Clinton’s side. About half of Trump’s supporters really are deplorable. 

Ta-Nehisi Coates, The Atlantic:

We know, for instance, some nearly 60 percent of Trump’s supporters hold “unfavorable views” of Islam, and 76 percent support a ban on Muslims entering the United States. We know that some 40 percent of Trump’s supporters believe blacks are more violent, more criminal, lazier, and ruder than whites. Two-thirds of Trump’s supporters believe the first black president in this country’s history is not American. These claim are not ancillary to Donald Trump’s candidacy, they are a driving force behind it.