Don't bother. People are unwilling to consider fatal flaws in the system. This isn't a forum of logical, factually-interested intellectuals it is the Church of Bitcoin & Libertarianism. Either praise its name or be labeled an apostate.
I don't see how you can logically deduce that a projects failure for not having strengths it never claimed to have. I believe there has been intense discussions and current development in many, if not all, the aforementioned weaknesses well before this became a widespread issue. This seems to indicate that the majority of the development community is working in the right direction as far as prioritizing the next round of features.
I can see plenty reason for Nagle not to have faith in the bitcoin project. His fault is not speculation, or the forum he chose for speculation, but his insistence that his opinion is in fact, fact.