In my personal experience higher education exposes a person to more diverse ways of thinking. One becomes more cosmopolitan in outlook. With such exposure, it becomes more difficult to be swayed by fear and suspicion, two aspects driving the modern American Conservative (who is indeed not Conservative, but Nationalist and xenophobic)
Today's Conservative is a victim of a cult of personality rather than ideology. Not all,that long ago, true Conservatives were applauding, among others, Paul Ryan on the GOP ticket as he brought fiscal Conservatism to the Republican brand. Since then, the Roger Stone/Paul Manafort Wing of dirty politics driven by lies, obfuscation, fear and suspicion has hijacked the ideologiwing of the GOP.
Being exposed to people in a college setting allows one to see through these vile aspects of contemporary politics.
So, yes. People with higher education are not as susceptible to fear mongering.