Also about immigration, a lot of the “deplorables” accurately perceive that much of the college-educated pseudo-left would and does prioritize the well-being of immigrants and refugees over that of already-present lower-class Americans.
This does not justify the hatred and racism by any means, but there’s is not an inaccurate assessment of the situation. The reason Clinton called them “deplorables” isn’t really about racism but rather the accusation of racism as a proxy for ignoring and minimizing class privilege and neutralizing the possibility of class solidarity. (Hint, hint.)
Contempt and derision from those more powerful than you are and who are directly responsible at least in part for your immiseration does not bring on the most rational of reactions. See “Trump, Donald” and “Pence, Mike” for examples.