On the contrary, such analogies are the best way to explain to Trump voters why some people equate their votes with racism, by taking the charged aspects of the situation out of the analysis. I see many Trump voters loudly trying to convince themselves that they didn't just support racism by shouting "I'm not racist!" at the top of their lungs. Well, as with many things, there are degrees of racism, and while they may not be tying nooses they're looking the other way at best. I'd have a lot more respect for them if they'd man up and own their vote, the way I knowingly voted for (and thereby supported) homophobia, surveillance states, and hawkish foreign policy in the past.
Not that any of those issues, frankly, carry the weight that racism does, given our country's history. There is no clearer sign that the GOP has no moral compass than white nationalists in the White House.