I have never once in my life encountered this hypothetical racist leftist, and a I've met a fair variety of racists. Why would you pick this topic as one to be a whataboutist about, when it's really not that ambiguous in the current US political climate.
If you thought that easy access to welfare was bad for people then you'd have met a hell of a lot of leftists who want "racist" policy.
My whole point is that one's evaluation of what is and isn't racist policy (assuming one believes in systemic racism in the first place) is based on what you consider good. Take a step back. Assume both parties believe that what they want is good for people and then assess the situation.
I'm not denying that there's racist hicks in the republican base. There's some racist hicks in the democratic base too (the stereotype of the waspy union worker who votes a straight blue ticket didn't come from nowhere) though IMO they're likely smaller in proportion of the party's base.
If you thought water was piss you'd have met a lot of people that like to drink piss.