Are they really not supporting their assertions, or are you just unsatisfied by what they do present?
When support is presented and it is unsatisfactory that is most often explained. There are a large number of cases where there is no support offered whatsoever. In fact I'd say that "most" is wrong. Only a very few support their assertions with anything other than more assertions. And when they do they get the facts wrong but at least those few do offer some support.
I will continue to suspend IaJ when he makes assertions about speech but refuses to begin to support those assertions with his definition of what he is talking about. That is an example of the kind of "debate" that is not of any value to either party.