There's something very dangerous happening in states across the country. A wave of legislation, introduced in more than two dozen states, would allow people to discriminate against their neighbors. Some, such as the bill enacted in Indiana last week that drew a national outcry and one passed in Arkansas, say individuals can cite their personal religious beliefs to refuse service to a customer or resist a state nondiscrimination law. Others are more transparent in their effort to discriminate. Legislation being considered in Texas would strip the salaries and pensions of clerks who issue marriage licenses to same-sex couples — even...