It's a huge stretch to claim those actions are both solely due to race and immutable positions that can't be overcome.
And if you base your position on the 2008 crash then my counter is easy. A minority of non-rich white people did push for austerity, but the # who just plain wanted the bread was so large it pushed Obama to the biggest landslide win of the last 35 years and gave the Dems a supermajority in the Senate. And that was in the era when folk still thought that Obama was a true liberal with a black radical for a pastor.
This shyt ain't immutable. There are plenty of folk who can be convinced to vote in their self-interest if it's sold to them correctly. The stalwart racists who obey the scorpion and frog metaphor are there, but they're not a majority. Biggest issue is that people don't believe the democratic establishment is actually concerned with their welfare, and often they're right. A non-racist populist party that fought for the poor, working-class, and middle-class over the rich while shelving most cultural issues to the side would dominate with the "average Joe" voter, it's just the donors and establishment politicians who keep them from climbing the ranks.