Prior to the Reformation the population of Europe (the only place with substantial numbers of Christians at the time) ranged from roughly 30 million to 100 million. Just in the 20th Century alone there have been billions of non-Catholic Christians. Your 99% figure cannot be correct.
However, even if, for arguments sake, the number were reduced to 89% or 79% the point is still valid.
While I agree that your overall point is valid...time for another nitpick! Catholics who died unaware of the Theory of Evolution (which includes every one of them who died before the mid-19th Century) don't count, so he's technically not calling them idiots, only the billions who have lived since then.
Your numbers just don't add up. The total number on non Catholic Christians who have ever lived is approximately one billion. Conservative estimates of the total number of Catholics (all catholic sects that accept Apostolic Succession) is at least four times that number. Were I to use the YEC litmus test of only counting as Christians those who believe as I do, the number would be 100%.
"Catholics who died unaware of the Theory of Evolution (which includes every one of them who died before the mid-19th Century) don't count, so he's technically not calling them idiots, only the billions who have lived since then."
I am including those who accept the divine guidance of the Church. The Church did not discover anything new in Scripture to support the compatibility of the bible and science, the affirmed it and evolution helps explain it.