I have genuinely never heard or read a Trump supporter discuss any practical effect of immigration, illegal or otherwise, on their actual communities. It's all very theoretical, based on hyperbolic and often false "news" items, and involves a heavy dose of borderline glee in being emotionally callous and selfish.
At beast, I have seen people misread statistics to support their position, but, again, that's not really "how it effects their community".
Okay, here's something written by Trump supporter and Cal State Fresno prof. Victor Davis Hanson discussing the effect of immigration on a community where he has lived since 1970:
That is a valuable perspective and all, and I don't discredit it (or concern for curbing illegal immigration as a top policy priority in general), but I'm not sure it's that persuasive for the point you are trying to make.
Let me put it this way: pointing to one cogent article by a non-representative Trump supporter (you won't find many of them in academia, and the college-educated skew liberal/Dem) doesn't really make me change my mind about writing most of them off as racists based on my personal experience and what most of them say (which is not as cogent and reasonable as this guy's article).
Couldn't your personal experience be a function of what Trump supporters make it through your filter bubble? We tend to see mostly the stupidest exemplars of our political opponents.
At beast, I have seen people misread statistics to support their position, but, again, that's not really "how it effects their community".