Jackie Robinson use to go to Republican conventions.
Charlton Heston marched with MLK.
First forced school integration was from Eisenhower.
Al Gore Senior and Robert Byrd voted against the 1964 Civil Rights legislation. Which was prety much passed by more republicans than democrats. It was that Johnson signed it that everyone thinks that it was mostly democrats.
The Civil Rights issues were regional issues and not necessarily party issues as almost all the Democrats in the South Voted against the Voting Rights Act and each of the Southern Republicans voted against the Voting Rights Acts.
Gun control laws were initially passed to keep guns from blacks.