Is separation of church and state necessary?

 The lack of a national religion supported and established by the federal government has been hailed as one of the most important principles that ensure religious freedom in the United States. In addition, the ability to practice any religious or non-religious beliefs is equally applauded as a core tenant of religious freedom. Still, the debate over religious freedom continues throughout our nation. Currently, numerous organized religions co-exist with organizations for non-believers. In your opinion, what are the essential elements of religious freedom? Is separation of church and state necessary? Does the U.S. Constitution equally and effectively protect the rights of all religious believers and non-believers? Explain your reasoning, discuss why you are taking the positions you are taking in your response.