All you need to know about the right and civil rights is to look at what right wingers at the time were saying about it. Buckley opposed it and even pushed the usual IT’S A COMMUNIST PLOT crap. Goldwater while not an ugly racist opposed the CRA using the states rights excuse. HW Bush opposed the legislation as did Reagan. Nixon had been early in his career good on the issue but after 1960 became weaker on the issue. The best Republican President on the issue was probably Gerald Ford who voted for the legislation as a House member but he still didn’t find it important enough to refuse to endorse Goldwater over which I might add several Republicans did.