Law is more complicated than quoting bits of text that you like. You actually have to consider other texts (the fourteenth amendment made the bill of rights applicable to states) and case law (Everson v. Board of education confirms that states and school districts can't support specific religious activities).

No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.