It's the way the link refers to Cameron that smacks of astroturfing.
Also, your assertion that the Conservatives would have done the same in 2004 is a bit off - that was the time when they were advising "sup with a long spoon" and stating that the wider rapprochement was inadvisable (though terrorism/WMD bits were welcomed).
I don't think the surprising extent Blair's role in Libya is particularly widely known - handwringing over the past doesn't get you much, but neither does ignoring it. Especially in the first months of a new administration when the inherited situation does remain relevant (yes, I'm sick of hearing it like a mantra, but that doesn't change the basic relevance),
BTW, Cameron hasn't done anything icw arms sales that is different from his predecessors. So singling him out is biassed. It is possible to dislike bias without condoning the issue.
And I still think the entire article is a poorly researched cut and paste job.