Uhmm, this makes absolutely no sense. Parties are made up of people and those people change over time. The Democratic Party could have been 100% racists 50 years ago and that means nothing as to what it is comprised of now.
Donald Trump is one person. He is exactly the same person today as he always was. If the Democrats had nominated Robert Byrd to be president you would have a point, but they haven't. (Him being dead and all doesn't help) Hell, even Byrd might be less racist than Trump because at least he apologized and admitted what he did was wrong. Trump has never apologized or admitted any fault for his long, long history of extreme racism.
Anyway it's ironic that now conservatives are so angry at her attempt to stifle free speech that they are threatening to kill her for her speech. You can't make this shit up, haha.