Black voters are not to the right of Bernie, and Bernie's campaigns were far more antiracist than Hillary's or Biden's- unlike them, he had never ever, at any point, pandered to the white backlash on any issues at all.
Also, there is no reason for anybody to still be spreading the canard that Bernie only cared about white men- economic justice was and is for the good of all, he had identical if not more progressive positions on fighting racism, supporting LGBTQ issues, and defending choice.
And in any case, Bernie isn't ever going to run for president again, so what's the point of continuing to smear him on these issues?
There have never been any eras or any issues where bland white centrists with corporate backing were better on "social justice" issues than progressives, so why keep pushing that myth?