The only racial bias large enough to make a case out of, is this: imgflip.com/i/aoxbk8
I miss the days when Socialists were obsessed with the subject of poverty instead of racism - that discussion actually gets somewhere, and doesn't alienates people who are right from Marx completely. Here in Denmark, our zero refugee policy and clamming down on Islam has the backing of the old Socialists as well, though we're kinda special that way.
But generally since poverty world-wide has been falling steadily for the past 20+ years, old-school Socialism has done badly (my conclusion after I left Communism way back), and had to be replaced with a monopoly on something more sensitive like race, and people Left of Socialism took that on immediately.
Like, for Bernie to stay relevant, he had to go all-in on the Democrat race hustling as well. I believe that's how he went from being a firm believer in the Nation State and closed borders in 2014 - he called open borders a 'Koch Brothers proposal' - one for the rich that would make everyone else poorer - to become your average subverter of the U.S.
Open borders and mass immigration is not a Democrat idea though, but a EU one. Dems are just a branch like most other extremely unpopular Liberal parties of the west.