Entirely wrong. The various tax laws have criteria for tax exemptions, and none of those criteria involve inquiry into any religious organization's doctrines. Income tax laws simply ask what the organization does with its  money; a specified large fraction of it must be spent on religious or charitable purposes; you aren't supposed to be able to disguise a business, or a political party, as a church. Local property tax laws ask what the property is used for; if it's used for worship, provision of services to its members, and other valid charitable purposes, it's tax exempt. A Kingdom Hall of the Jehovah's Witnesses, a Salvation Army mission, a Catholic cathedral, and a Sikh temple all qualify, as do the religious properties of a myriad of other religious organizations.