The hard answer is that your failure to aprroach them, reason with them and reassure them that you care about their problems was so complete that they turned to the only other option they had.
I'm sure GAF has given this exact response to that exact argument a million times by now, but what the heck let's go again.
"No no no don't get me wrong, I'm not actually racist, I'm only racist because I saw the left getting angry about racism. This makes sense."
It's just...no.
You are trying to humanize Trump voters by saying that they were just worrying about X or Y and if only there was more Z this wouldn't have happened. My problem with that is that the idea of someone who realizes how awful Trump is, but still votes for him because he said "Jobs!" once, is even more horrifying than the idea of a Trump voter who just got really excited about the wall. The second guy is just dumb and uninformed, THAT PROBLEM CAN BE FIXED, the first one is an actively malicious monster.
I was unemployed for two years, which made life pretty difficult. Eventually I got a job...in a company that's constantly moving different elements into cheaper countries, so who knows how stable that is. I may have 'economic anxiety', and the plight of minorities like, completely 100% does not affect me in any way. Heck, I live in a country where I see a black person about once a month and it still feels like seeing a unicorn.
But I'm still voting left, because none of the above means I now have a free pass to be a complete dickhead to everyone. I may have struggled to get by, but I have a mother and two sisters. If the guy who promises to help me also thinks women exist only to be submissive to men, that's not a deal I'm going to make. Because unlike
every single person who voted for Trump, I actually have empathy for other people, and sometimes care about stuff that's not completely about me.