When confronted with their racist past, Democrats always counter with the silly argument that, after the Civil Rights Act, the parties "switched sides".
Which would mean that all of the racist Democrats suddenly became racist Republicans. But...did all of the Republicans suddenly become Democrats?
That's so obviously not true. Even if it were partially true - say 50% of racist Democrats suddenly became racist Republicans - that would mean that the Republican party suddenly gained millions of voters, which clearly didn't happen.
The next time that you hear this idiocy, counter with one simple question: what evidence is there that huge numbers of Republicans suddenly became Democrats?
Democrat drones are so stupid that things like this never occur to them.