The Colorado Court of Appeals is hearing oral arguments in a discrimination case brought by a same-sex couple against a cake shop that refused to sell them a cake for their wedding reception. The owner argues his religious beliefs should protect him from sanctions against his business. In 2012, Colorado residents David Mullins and Charlie Craig visited Masterpiece Cakeshop to order a wedding cake. Mullins and Craig planned to marry in Massachusetts and then celebrate with family and friends back home. Masterpiece owner Jack Phillips informed the couple that, because of his religious beliefs, it was his standard business practice to refuse to provide cakes to customers for same-sex weddings. Phillips reportedly had turned away several other couples for the same reason. Phillips argues he has no problem serving gay people at his store, but he says that making a wedding cake for a same-sex wedding would violate his Christian beliefs, as it relates to marriage. "We would close down the bakery before we would complicate our beliefs," Phillips said last year, according to CBS Denver. This case underscores how the already simmering tension between religious freedom advocates and gay-rights supporters is likely to become more heated in the aftermath of the U.S. Supreme Court's landmark ruling last month legalizing same-sex marriage nationwide. "As marriage equality becomes law all across the nation, it's especially disheartening that we're still fighting this battle where businesses like Masterpiece Cakeshop feel they can violate the law and discriminate against us just because of who we are and who we love,†Mullins said in a statement. His partner Craig added, "It's time we moved on from using religion as an excuse to discriminate. No one should be told they are less than anyone else, especially at a joyous time like a wedding.†Colorado's Anti-Discrimination Act prohibits businesses, such as Masterpiece Cakeshop, from refusing service based on factors including race, sex, national origin, or sexual orientation. The American Civil Liberties Union and the ACLU of Colorado filed suit on behalf of Mullins and Craig in 2013. In December 2013, an administrative judge ruled that the bakery had illegally discriminated against the couple. In 2014, the Colorado Civil Rights Commission affirmed that ruling. Masterpiece Cakeshop appealed. But even before the U.S. Supreme Court ruling on same-sex marriage, the conflict between religion and LGBT rights was heated. In Washington State, a florist has been fighting a lawsuit against her for refusing to provide services for a gay wedding in 2013. Additionally, two years ago, the New Mexico Supreme Court ruled that a photographer who wouldn't take pictures of a gay couple's 2006 commitment ceremony violated the state's discrimination law. Just last week, the Bureau of Labor and Industries ruled that owners of a Portland-area bakery that declined to make a wedding cake for a gay couple two years ago must pay $135,000 in damages for their emotional suffering. Continue reading on the next page... According to Rep. Gordon Klingenschmitt, a republican from Colorado Springs, "it's not the government's job to force him (Jack Phillips) to violate his conscience and every citizen should be frightened that special interests want to take away your right to your religious beliefs. We should all say no to that," On the other side of the argument, notes ACLU of Colorado Legal Director, Mark Silverstein, "nobody gets to pick and choose which laws they want to follow. If a business owner is allowed to simply cite personal beliefs as a basis for turning away same-sex couples, then what stops a doctor from denying medical care or a pharmacist from denying a prescription?†When businesses and other institutions that serve the public have sought exemptions to laws barring discrimination based on sexual orientation and gender identity, the courts have held that businesses are required to comply with LGBT discrimination laws, reports the ACLU. The courts have ruled without regard to whether LGBT people could have obtained the goods or services elsewhere. Instead the courts have recognized the harm to the notion of equal opportunity if LGBT people can be turned away from businesses otherwise open to the public because of who they are. "This case has never been about cakes. Let me be clear: This is about sending a message that 'open for business' in America means open to all,†ACLU Deputy Director, Louise Melling, stated. "We strongly believe that freedom of religion is our constitutional right and we will continue to defend it, but religion should not be used as an excuse to discriminate. That's why we're fighting for Dave and Charlie and others who are victims of discrimination in the name of religion.†Some LGBT advocates also argue that religious freedom was used in the past to justify laws and discrimination against people based on race and gender.