Basically the type of people who think saying "Black Lives Matter" means you hate White people.
Also, WaPo recently used one question from historical surveys by the ANES (American National Election Studies) to measure what they consider "white resentment", and there seems to be a large correlation between that and other political positions. [2]
(Skip to the "Here’s how we did our research" part and the graph if you're not a fan of WaPo)
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[1] https://obsidianwings.blogs.com/obsidian_wings/2008/08/my-on...
[2] https://www.washingtonpost.com/news/monkey-cage/wp/2018/01/1...
Unless you grant that Republicans say that "blacks are lazy and violent" because right-leaning Internet randos say it online.
The presumptive Democrat candidate put out words of unity, compared to Trump's verbal shit splatter.
https://www.theguardian.com/world/2008/apr/14/barackobama.us...
Obama was caught in an uncharacteristic moment of loose language. Referring to working-class voters in old industrial towns decimated by job losses, the presidential hopeful said: "They get bitter, they cling to guns or religion or antipathy to people who aren't like them or anti-immigrant sentiment or anti-trade sentiment as a way to explain their frustrations."
Whether or not the specific phrase 'white trash' is said or not said doesn't matter. It could be 'clinging to guns and religion', could be 'deplorables', etc.
Racism totally does exist among the demographic we're talking about but it's not the only motivator anyone ever has.
Trump can afford to say “much worse” just like republicans in the past could afford to use the “Southern Strategy” and dog whistle to their constituents.