Steve,
You have misquoted Carl Sagan. Furthermore, you have critisized his misquote.
This is unethical and worthy of public apology.
Please write a blog post correcting for the error (an apology would be appreciated, but a correction is the minimal thing you could do), or remove your blog post altogether.
Carl Sagan was an advocate of peace and human exploration. Misquoting the dead is deeply insulting and "fear based".
Thank you.
"Extraordinary claims require extraordinary evidence." - Carl Sagan, in "Cosmos".
Carl Sagan - Wikiquote