I think meta-conversations can quickly go downhill, but that they can also be constructive. I'll just say that there's always room for doubt, including in our presumptions about the intent of others, and that linking to an article about a particular cognitive bias doesn't necessarily strengthen an argument, nor does it put someone above that bias. For whatever it's worth, I've found that when I encounter apparent (possibly offensive) disagreement, I'm less constructive when I act on presumptions, and more constructive when I engage a Socractic dialog.