In Western countries
In a 1979 consultation on the issue, the United States Commission on Civil Rights defined religious discrimination in relation to the civil rights guaranteed by the Fourteenth Amendment to the United States Constitution. Whereas religious civil liberties, such as the right to hold or not to hold a religious belief, are essential for Freedom of Religion (in the United States secured by the First Amendment), religious discrimination occurs when someone is denied "the equal protection of the laws, equality of status under the law, equal treatment in the administration of justice, and equality of opportunity and access to employment, education, housing, public services and facilities, and public accommodation because of their exercise of their right to religious freedom".
However, cases of religious discrimination might also be the result of an interference of the religious sphere with other spheres of the public that are regulated by law. Although e.g. in the United States the Free Exercise Clause of the First Amendment states that "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof", in Reynolds v. United States the U.S. supreme court decided that religious duty was not a suitable defense to a criminal indictment. In this specific case a law against bigamy was not considered to be discriminating against Mormons, who stopped practicing Polygamy in 1890.
In Canada, during 1995-1998, Newfoundland had only Christian schools (four of them, Pentecostal, Roman Catholic, Seventh-day Adventist, and inter-denominational (Anglican, Salvation Army and United Church)). The right to organize publicly supported religious schools was only given to certain Christian denominations, thus tax money used to support a selected group of Christian denominations. The denominational schools could also refuse admission of a student or the hiring of a qualified teacher on purely religious grounds. Quebec has used two school systems, one Protestant and the other Roman Catholic, but it seems this system will be replaced with two secular school systems: one French and the other English.
Ontario had two school systems going back before Confederation. The British North America Act (1867) gave the Provinces jurisdiction over education. Section 93 of the BNA Act offered constitutional protection for denominational schools as they existed in law at the time of Confederation. Like "Public schools", Catholic schools are fully funded from kindergarten to grade 12. However, profound demographic changes of the past few decades have made the province of Ontario a multicultural, multi-racial, and multi-religious society. The thought that one religious group is privileged to have schools funded from the public purse is becoming unacceptable in a pluralistic, multicultural, secular society. Although its also true that the people who send their children to those schools have a form that directs their tax dollars to that school system.
Canadian faith-based university, Trinity Western University is currently facing a challenge from members of the legal and LGBT community to its freedom to educate students in a private university context while holding certain "religious values", such as the freedom to discriminate against other people, including requiring students to sign a chastity oath, and denying LGBT students the same rights as straight students. TWU faced a similar battle in 2001 (Trinity Western University v. British Columbia College of Teachers) where the Supreme Court of Canada ruled that TWU was capable to teach professional disciplines.
On June 16, 2019, Quebec banned public servants in positions of authority from wearing visible religious symbols. The legislation was erected with the goal of promoting neutrality. Prime Minister Trudeau argues that the ban goes against fundamental rights of Canadian people.
Scientologists in Germany face specific political and economic restrictions. They are barred from membership in some major political parties, and businesses and other employers use so-called "sect filters" to expose a prospective business partner's or employee's association with the organization. German federal and state interior ministers started a process aimed at banning Scientology in late 2007, but abandoned the initiative a year later, finding insufficient legal grounds. Despite this, polls suggest that most Germans favor banning Scientology altogether. The U.S. government has repeatedly raised concerns over discriminatory practices directed at individual Scientologists.
In Greece since the independence from the Muslim Ottomans rule in the 19th century, the Greek Orthodox Church has been given privileged status and only the Greek Orthodox church, Roman Catholic, some Protestant churches, Judaism and Islam are recognized religions. The Muslim minority alleges that Greece persistently and systematically discriminates against Muslims.
Recently, professor Nick Drydakis (Anglia Ruskin University) examined religious affiliation and employment bias in Athens, by implementing an experimental field study. Labor market outcomes (occupation access, entry wage, and wait time for call back) were assessed for three religious minorities (Pentecostal, evangelical, and Jehovah's Witnesses). Results indicate that religious minorities experience employment bias Moreover, religious minorities face greater constraints on occupational access in more prestigious jobs compared to less prestigious jobs. Occupational access and entry wage bias is highest for religious minority women. In all cases, Jehovah's Witnesses face the greatest bias; female employers offered significantly lower entry wages to Jehovah's Witnesses than male employers.
According to a Human Rights Practices report by the U.S. State department on Mexico note that "some local officials infringe on religious freedom, especially in the south". There is conflict between Catholic/Mayan syncretists and Protestant evangelicals in the Chiapas region.