Brett's interaction with these self appointed so called 'orthodox' Lutherans (just like Huber applied the label to himself and called those who disagreed with him as Calvinists) can be found here.
You can see that the Huberites are allergic to the notion of faith causing anything. They are horrified to think that faith in Christ may actually make something happen, like say cause you to be declared righteous in Christ. See the drift I am heading?
In truth, though the BoC signers did not consider faith as meritorious, they did consider it as a cause of Justification under the premise that such a faith came from the HS created through the Means of Grace.
The technical term they used for this is instrumental cause. What the BoC denied faith to was its meritorious cause as if it was inherent to man. They did not deny to faith its instrumental cause. Thus it is of some cause nevertheless.
Pr. Paul Rydecki has a lengthy post on this and you can find it here.
When these Huberites engage Brett, they are like wasps ganging up on him. They often drop names for themselves, with the intent that an outside reader might think they are genuine Lutherans. For example in answering Brett, they start off by claiming "we orthodox Lutherans believe blah blah blah, yada yada yada". You now wonder what "orthodox" means. They think they are when in fact they are devotees of Walther.
Yet, if these people have studied the orthodox Lutherans they claim they have affinity with, they would have showed knowledge as to why faith justifies as the BoC authors said and not malign faith as if each time we mention it, we are promoting faith in faith. So these Huberites are just faking it.
Let them come to this turf, if they have the fortitude to leave the safety of their haven, I dare them and would welcome their dirt and venom.