Well , there are good Christians and bad Christians , and there are some who call themselves Christians but really aren ' t . The problem is that there ' s no real alternative to selfidentification . I can make general statements about actions , attitudes , and beliefs that aren ' t Christian , but it ' s much harder to actually point at people and say they ' re not Christian . So I could say members of the KKK or Westboro Baptist Church aren ' t real Christians , but things are far too nuanced to say all Democrats or all Trump supporters aren ' t real Christians . However , when it comes to candidates , I think it ' s best to be skeptical too . I ' ve seen Facebook comments lauding Trump as a good Christian just because he ' s quoted the Bible in some speeches , but I see absolutely nothing in his characteractions to support that . I would definitely call those kinds of supporters misguided , but I wouldn ' t condemn them as not being Christians . I think most of this is best summarized in Matthew 7 . Matthew 7 versionESV