Actually, if you knew your history, you would know that the parties switched platforms regarding race and civil rights before any of us were even born. The Republican Party, desperate to remain relevant, adopted the Southern Strategy.
https://en.wikipedia.org/wiki/Southern_strategy
The only way Republicans can hang on to power is to convince dupes that economic inequality is caused by Mexican laborers and Jewish bankers. Meanwhile, their friends on Wall Street extract the wealth of the middle-class to enrich themselves.