ntil the Republican party adopted the Southern Strategy in the 70's to win over the racists
It's absurd that the Wiki page you link to labels the "southern strategy" as racist - when the main thing that entailed was Republicans advocating for states rights! The article tries to paint that as pandering to "scared white people" but if you even thought for a second about what it actually meant, you'd realize that stronger states rights means more control for blacks than whites in the south where the black population is a majority, since after all they could vote at that point... That is how Nixon managed to get a high percentage of the black vote. Think again, WHY would black people vote for Nixon in large numbers were he pandering to racist whites?
That whole article is a prime example of how Wikipedia tilts so far towards Democrats it's horizontal.
The Republican party used to be basically like the Democratic party was today.
Not at all, things are still as they were. Democrats still seek to keep "lower classes" like the black minority groups down, by keeping them addicted to government handouts and assistance.
Affirmative action is another example. It is basically a declaration that the specified minorities are inferior and cannot help themselves. When you expect less from people you get less, which serves no-one well.
As far as I can tell, Republicans are still the only major party offering true equality and freedom from racial discrimination.
It is rather funny that the black population continues to vote in large numbers for Democrats, at this point it's a combination of Stockholm Syndrome and very advanced propaganda from Democrats parroted and amplified by much of the media. Looks like the racists won after all.