Why don’t you tell us the real number then?
Now that is, pardon my candor, a dumb question.
First of all, ignorant people aren't aware that they are ignorant. Point #2: ignorant people have no qualms about making up numbers, or quoting some obscure rant that does exactly that.
So where does that leave us?
How about insisting on documented numbers from historical sources?
If the ranter is claiming that during the official period of the "Inquisition" all executions, wars and other normal regional killings were religiously based, then all bets are off.