Steelman their position. Try finding reasons good people would vote for Trump, or at least sincere mistakes of reasoning that a good person could make.
I'll give them a steelman:
They thought Trump would reduce their taxes (he hasn't, by and large).
They thought Trump would cut government waste (he did the opposite).
They thought Trump's tough-guy persona would convince foreign countries to fall in line (it hasn't, they have shunned the USA).
To get Trump supporters to vote for you it's important to beat Trump at addressing their concerns. Even a small swing of 5-10% of them could win an election.
Addressing their concerns will do nothing, just as it did nothing in the past. They will hate you for addressing their concerns and blame you for things Trump caused. Each time they were given something, they just got more aggressive and harmful
Yes small swings could change election results, but none of them will come from Trump voters. This argument just serves to more politics further to the right.
Those people wanted harm, wanted to cause pain and addressing their concerns does not provide any of that.
