The Southern Democrats were conservative and became republicans because of civil rights legislation. I'm sure you must know that.
That's an interesting theory you've cooked up considering the majority of southern state legislatures are still controlled by Democrats and the southern shift to the GOP at the Federal level really didn't begin until the 80s with Reagan. The south became friendly to Congressional Republicans because of their typical support of social and cultural issues, ie. abortion, religious views, family values, etc. It's got nothing to do with civil rights hence the reason the Democrats are still very strong at the state and local level in most southern states and that's because they are culturally conservative, unlike the national Democratic party which is culturally liberal overall. But I'm sure you didn't know that.
Wrong
Republican House Member Misrepresents History On Civil Rights Legislation | The Moderate Voice
Â… On the surface it would indeed appear that the Republicans, and not the Democrats as commonly assumed, were the champions of civil rights in the 1960s.
However, a slightly more careful analysis of the Civil Rights Act voting record shows a distinct split between Northern and Southern politicians. Among the southern states (Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, and Virginia), Senate Democrats voted 1-21 against the bill (5%) while Republicans voted 0-1 (0%). In the House, southern Democrats voted 7-87 (7%) while southern Republicans voted 0-10 (0%). Among the remaining states, Democrats voted 145-9 in favor of the bill (94%) while Republicans voted 138-24 for the bill (85%). In both the North and the South, Democrats supported the 1964 Civil Rights Act at a higher rate than the Republicans.
The marriage within the Democratic Party of the northern liberals and the southern Dixiecrats had always been a strange one based more upon a common enemy (the Republican Party) than upon common ideals. In fact, when the 1948 Democratic platform came out strongly in favor of civil rights, delegates from 13 southern states held their own convention shortly after the adjournment of the Democratic National Convention and nominated Strom Thurmond to run for president on their own “States Rights Democrats” ticket.
While Mr. Davis is clearly correct in his assertion that Southern Democrats were staunch foes of civil rights in the 1960s, Southern Republicans, though fewer in number, were equally adamant in their opposition to civil rights legislation.
The modern Democratic Party owes its current character far more to the Northern liberals than to the Dixiecrats. If the old Southern Democrats are to be labeled as racist, then Al Gore and Bill Clinton are Southern Democrats in name only as their defense of civil rights places them solidly among the Northern Democrats and not with the Dixiecrats of old.
In the two decades following the 1960s, the now-notorious “Southern Strategy” begun by Richard Nixon and continued by Ronald Reagan led to an exodus of Southern Democrats to the Republican Party. Those were the Democrats who voted against the emancipating legislation of the civil rights era: the racist, white supremacist Dixiecrat Democrats — not the ones who form the Democratic Party today.