"While we trust your good intentions, yes, we would like you to refrain from releasing the code at all and to remove the blogpost explaining the algorithm."

It doesn't say directly the description is a problem. IMHO it's the whole blogpost, because it contains code.

dude that guy is surely bullshitting Description of an invention is actually the purpose of the patent! Patent is there to allow other to get knowledge about your invention while protecting your "Commercial" interests!