I am no Trump fan, but I noticed a couple of points that might be misguided or incomplete:
1. "Trump's casual racism, misogyny, and conspiracy theories are without precedent among major presidential nominees."
-- I think this is probably a stretch. I would guess that many previous candidates were just as bad if not worse. It just so happens now that everything candidates say or tweet is recorded, played back, and ultimately scrutinized far more than in the past.
2. "We are a nation of immigrants, and we know that immigrants built this country (and Trump, of course, is the grandson of immigrants and married to an immigrant)."
-- immigrants and slaves built this country