Should marriage be redesignated to just the religious sacrament?

This whole matter is based on semantic ambiguity. Marriage, as understood by all major religions, is the union of a man and woman for the primary purpose of begetting children and providing them with a secure, stable environment.
With this definition, gay marriage is an oxymoron and, therefore, its non-existence involves no human rights infringement. That gay people want their long-term relationships recognised by the State is understandable but does not give them the right to redefine the word ‘marriage’ and insist that others accept this new definition.