Voting is done with secrecy for a reason. One of the results of this process is that people tend to vote their conscience. I speak for those people I know, among them many who know much about politics, but also many who know very little. What was outstanding was the extent of corruption that became synonymous with Clinton, and basically extended her record of non-prosecuted crime from decades ago into the present. Aside from the claims and conjectures made by the Clinton campaign about Trump, there was nothing remarkable to brand him in similar negative light. An additional factor was the strong perception that Obama was not friendly or supportive to Israel, and was actually supporting Muslim terror. Clinton campaigned on the back of Obama, espousing his legacy, and vowing to continue and expand it. Everyone I know who voted for Trump was frightened to give a vote to support Hillary.
Lastly, the election was perceived as voting for the lesser of two evils. Do we vote against Hillary or Trump? Strange. That’s what I gleaned from so many conversations with voters.