My recollection is that it was the liberals at the forefront of the civil rights movement of the 1960s that resulted in an end to segregation in the US. The Catholic priest, Rev. Philip Berrigan, was a prominent leader in that movement. Many of the black leaders were Christian ministers.
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The complete list of the 21 Democrats who opposed the Civil Rights Act of 1964 includes Senators:
- Hill and Sparkman of Alabama
- Fulbright and McClellan of Arkansas
- Holland and Smathers of Florida
- Russell and Talmadge of Georgia
- Ellender and Long of Louisiana
- Eastland and Stennis of Mississippi
- Ervin and Jordan of North Carolina
- Johnston and Thurmond of South Carolina
- Gore Sr. and Walters of Tennessee
- H. Byrd and Robertson of Virginia
- R. Byrd of West Virginia
Democrat opposition to the Civil Rights Act was substantial enough to literally split the party in two. A whopping 40% of the House Democrats VOTED AGAINST the Civil Rights Act, while 80% of Republicans SUPPORTED it. Republican support in the Senate was even higher. Similar trends occurred with the Voting Rights Act of 1965, which was supported by 82% of House Republicans and 94% of Senate Republicans. The same Democrat standard bearers took their normal racists stances, this time with Senator Fulbright leading the opposition effort.
It took the hard work of Republican Senate Minority Leader Everett Dirksen and Republican Whip Thomas Kuchel to pass the Civil Rights Act (Dirksen was presented a civil rights accomplishment award for the year by the head of the NAACP in recognition of his efforts).
Upon breaking the Democrat filibuster of the 1964 Civil Rights Act, Republican Dirksen took to the Senate floor and exclaimed "The time has come for equality of opportunity in sharing in government, in education, and in employment. It will not be stayed or denied. It is here!"
Sadly, Democrats and revisionist historians have all but forgotten (and intentionally so) that it was Republican Dirksen, not the divided Democrats, who made the Civil Rights Act a reality. Dirksen also broke the Democrat filibuster of the 1957 Civil Rights Act that was signed by Republican President Eisenhower.