Who terrorized Republican voters?

Republican voters from the latest times have been apparently afraid mostly of Islam and immigrants, which has had great impact on the outcome of the last presidential election, when bigotry and xenophobia were used as campaign signatures of Trump's candidacy and other high members of the party, rejecting people from other countries in the United States, especially non-European countries; boosting fear into a big portion of Republican voters from the idea of brown people coming into the country to steal their jobs or committing crimes, which are silly incongruities, since immigrants usually take jobs Americans dislike, and crime rates are higher within Americans themselves. Interestingly enough he republican party has become mostly conservative, when a long time ago used to be a liberal party.