All good points, but Republicans didn't lead the charge in breaking down Jim Crow.
Democrats, socialists, and communists got their heads broken and lives taken while organizing voter drives and demonstrations. Not Republicans, conservatives, or libertarians - with few exceptions.
Or so goes the accepted history - true as far as I know.
THe motivatins of the Communists were not related to civil rights, The Democrats certainly did do a lot - and Democrats tried to prevent it.
However, it is not true that Republicans did nothing