“I have a very good idea what Lutherans confess on this thread.”
So one sentence in one post is good enough for that? Hmmm...
“Thus I ask again if the Lutherans here are condemning post 19 by a denominational colleague who wrote ‘Luther agitated against the demonic cult known as Judaism’.”
Is it burden to condemn everything someone else says? I do not believe Judaism is a demonic cult, and I feel it was inappropriate to do so. But reviewing the posts by the poster, and without reading his mind, I also think it quite clear he was not intending to be anti-semetic.
“I have no idea what is in a book of concord; does it mention Judaism?”
Taking at face value and in good faith (though simply clicking on the link would have given all you need to know about it), the Book of Concord was written mostly during the reformation (though the ancient creeds also form a part of it) explaining the beliefs of the “Lutheran” church in comparison to the Roman Catholic Church. It is accepted completely (Lutheran Church - Missouri Synod, Wisconsin Evangelical Lutheran Synod) or to some extent (Evangelical Lutheran Church of America) by Lutheran churches as faithful statements of Christian doctrine.
Does it mention Judaism? Well I can do a search on that page same as you, and the Jews get a couple of brief mentions, apparently nothing significant. Which is understandable.
“It seems quite at odds with what the Lutherans of the Missouri Synod teach about Judaism on this web page.”
Okay, so then why such ado about what one poster posted on one thread somewhere on the internet?
Because you are the first, and only, (apparent) Lutheran who condemned the antisemitic post when you wrote, "I do not believe Judaism is a demonic cult, and I feel it was inappropriate to do so. "