And those 100+ year old statement formed the foundation for mormon teaching. You want something more modern - “Believers in the doctrines of modern Christendom will reap damnation to their souls.” - Apostle Bruce R. McConkie, Mormon Doctrine, see pp. 45-46 “... all the millions of apostate Christendom have abased themselves before the mythical throne of a mythical Christ.... in large part the worship of apostate Christendom is performed in ignorance, as much so as was the worship of the Athenians who bowed the Unknown Gods.” - Apostle Bruce R. McConkie, Mormon Doctrine, pp. 269, 374-375 Now your ignorance is confounded in that 50,000 some ought missionaries go door to door with a message that all churches but the mormon church are completely apostate. You don't get more recent than today.
An entirely new religion made up so recently that it is only 70 years older than some people who are alive today, and already it’s defenders are complaining that the documents and founders statements from the first 60 or 70 years are already outdated and no longer relevant, ‘please don’t use those we have new stuff’.