ll The passing of California bill 63 is a violation of Section 1 of the 14th Amendment.
14th Amendment, Section 1: All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States [emphasis added]; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
Note that the congressional record shows that John Bingham, the main author of Section 1, had included the 2nd Amendment in his official examples of amendments that 14A applied to the states. (See middle area of 2nd column of referenced page.)
"Mr. Speaker, that the scope and meaning of the limitations imposed by the first section, fourteenth amendment of the Constitution may be more fully understood, permit me to say that the privileges and immunities of citizens of the United States, as contradistinguished from citizens of a State, are chiefly defined in the first eight amendments to the Constitution of the United States." John Bingham, Appendix to the Congressional Globe