No, the Democratic party shed a few hundred years of racism starting with LBJ and a bunch of Democrats supporting, passing and signing the CRA, then the VRA in 1964 and 1965 and since then being consistent supporters of civil rights for blacks, and others, such as now LGBT.
Bottom line is Dinesh D'Souza and others fabricate an ignorant narrative about the "Southern Strategy" that's not supported by really anyone who has studied the issue. They create a straw man version of it, which is the GOP appealed to white southern racists and in just a few years, all these elected Democrats renounced their old party and became Republicans.
The more accurate 'story' is the GOP made the party safe for Southern white segregationists mostly by deemphasizing concerns over civil rights. In 1960 the GOP platform had a big chunk of it devoted to civil rights. By 1968, nothing. When Reagan appeared in his first post-convention speech in Philadelphia Mississippi and talked about "states' rights" and not the lynching of civil rights workers, that was part of it. He said the feds would stay out of similar matters, that states are the proper place to deal with those issues. That was the message of George Wallace and others - let the states deal with races issues. Reagan said, "I AGREE!!" So the party didn't have to become racist, just promise not to do things that would threaten racist southern whites, and they didn't.
And the bottom line is in 2020 the GOP is almost entirely lily white in D.C., and virtually all blacks who run for office do so as Democrats. Look at a picture of Congress, or the audience at the conventions, or at a Trump rally versus a rally for a Democratic party candidate. Obviously in this era that's not all about race - economics are a big part of it. But it's not an accident that the NC GOP requested a report on voting patterns for blacks in that state then targeted every way that encourages blacks to vote. It's why the courts struck down their "voting reform" bill because they targeted black voting patterns with almost "surgical precision." There's a reason the GOP has long opposed the Voting Rights Act, at least the part that limits state voting changes. They finally succeeded in gutting it, and NC was the result.
Etc.