Black Americans know very well that it is because of Trump. Black Americans are too wise to be fooled. After all they have been through, they are sensitive to threats against their continued survival and the whole Nazis in Charlottesville thing is as likely to have caught their eye as it did the Jews' eye. They both, Black Americans and the Jews, are sensitive to that sort of thing, like Nazis, in general, and they know the score. Trump can parade his Jewish son-in-law around like a banner all he likes and kiss up to the State of Israel, but they know the score.