Always remember that the Democrats, almost from their very founding, were and are a racist and bigoted party. And to point this out to them, though they deny it, makes them cringe, particularly because they know it is true, even if that particular Democrat isn’t a racist.
Their severe racism began in earnest with Andrew Jackson, and his ethnic cleansing of the southern Indians East of the Mississippi, forcing them West, resulting in the death of many thousands.
Then, of course, is the US Civil War.
Woodrow Wilson personally despised immigrants in his history books, but this did not prevent him from integrating them into the Democrat party to increase its, and his, power. His actions also resulted in the creation of the Second Ku Klux Klan, specifically calling for the rise of “patriotic organizations” during World War I.
“Ol’ Frank” Roosevelt had other issues in mind than race, though his wife Eleanor saw the potential of the black race to support her extremist political views.
The segregationist Dixiecrats, with the exception of Strom Thurmond, remained Democrats to their dying days, despite the left trying to pretend that they all became Republicans. And the “extended Dixiecrat family”, those who were not part of their central core, but embraced their ideas, created much of what the Democrats think of as the “moderate” wing of their party today.
For example, Bill Clinton’s mentor was Arkansas governor Orville Faubus, who became famous by blocking integration of the Little Rock high school.
And finally it can be pointed out that even to accuse Republicans of racism and prejudice, Democrats have to stoop to claiming that Republicans use “code words”, and otherwise have to “interpret” what they say as racist. But Democrats, when they are openly racist and bigoted, cannot conceal what they say, or control it.
They express REAL racism, bigotry and hate. No mistaking it, or need to interpret it, or to “contextualize” it. They are speaking from their heart. And a black and bitter heart it is.
"The first Republican I knew was my father and he is still the Republican I most admire. He joined our party because the Democrats in Jim Crow Alabama of 1952 would not register him to vote. The Republicans did. My father has never forgotten that day, and neither have I."
BTW, Rev. Martin Luther King Jr.'s father - Rev. Martin Luther King Sr. - was a Republican until JFK made a deal to get his son out of prison during the 1960 presidential campaign. Despite that, the Republican Nixon still got about 30% of the black vote. No GOP presidential candidate has come close to that since.