For example, I know it violates the First Amendment. Bob Smith is a California resident and is in violation of the Unruh Act. Any ban on gay marriage is in violation of the equal protection clause of the 14th Amendment. "No state shall deny any person within its jurisdiction equal protection of laws". I can also mention the Kim Davis scandal somewhere in the response. I believe I can also mention the due process clause of the 14th Amendment somewhere in this essay.