What would have been the reason to not elect Hitler in Germany? The Germans should have known by his character who and what he was but they too had 'concerns' about the way things were in their nation. Hitler got only 44% of the votes but they were people who were highly motivated by his hate mongery.
As far as the "ordinary voters" and their concerns you are dealing with people who have been brainwashed by Fox News and other hate mongers into having those concerns. Those "ordinary voters" do not represent 'ordinary' Americans. They make up about 1/3 of all Republicans (based on the voting percentages that Trump has been getting).