Hmmm... not sure of your story so please forgive me if im off base here.
The wayward side forum is a place for you to safely express ANY feelings you are having and to seek guidance. Try not so see your BSs reaction as a comment on the validity of your post. Your feelings are real, and complex and you will both struggle to understand them for many years to come.
It sounds to me as though BS doesnt feel heard or like you are giving yourself to the job of rebuilding the way he would want. Its not about the post, or really about why you cried. It really just sounds like he still doesnt feel validated by you and he is lashing out.
Try not to focus too much on the idea that YOU had this big breaktnrough and YOU feel like its progress. That IS making it all about you. Your BS is in immeasurable pain and feels lost in a world he is forced to live in but never chose for himself. When he says things like this, store your confusion, your anger and your fear - bring it to an IC or here to us where you can vent safely, and simply be there for your BS. Listen to how it makes him feel and ask what you can do better/differently.
He cant support your pain or your confusion right now. The tragic part is he probably wishes he could, but you arent safe anymore. He doesnt share your feeling of progress because he can no longer relate to you. He wants to feel progress himself, but how can he when he cant tell up from down and would probably like to take a vacation to hell to get a bit of a break from the pain cause by infidelity.
Be patient, be compassionate. We are here for you. But he cant be.