I'm not going to cop to strawmanning here, but I will grant that people who are receptive to his messaging on immigration might hear it differently than I do.
Perhaps part of my difficulty understanding how someone could resonate with that messaging without being an irredeemable racist stems from it not being based in reality any time there are actual numbers available from law enforcement. Drug couriers are citizens far more often than they are immigrants. Illegal immigrants have a lower crime rate than citizens. Noncitizens attempting to vote is rare and usually results in prosecution. "Open border" means something very different to me, e.g. intra-EU borders than it seems to mean to Trump.
Despite all that, Trump's supporters feel like he's telling them the truth about these issues and everyone who contradicts him is lying. The explanations that come to mind for me are... uncharitable. I'd like to hear alternatives.
I think the main thing I can take away from this is I'd be terrible at running a political campaign. I already knew that.
While I can understand how more traditional conservative messages resonate with people, Trump's are outside my Overton window. I can see the mechanics of how it works, and I can empathize with people who feel like the current system is failing them, but not with those who feel like Trump is going to fix it.
I'm disappointed your comments are attracting downvotes. They are on-topic and well-reasoned.