(hit submit on this just before leaving this morning, didn't see till I got back there was an error.)
The Alhambra Decree etc weren't part of the Inquisition itself; that's changing the topic. There weren't 100,000 prisoners who died in the Inquisition; that's roughly the total number of cases they heard. Estimates vary but all the ones actually based on the historical data say less than 10,000.
Anyhow, I'm certainly not saying that the existence of Mao means the treatment of Jews in Spain over the centuries wasn't a problem.
I am saying your perspective is skewed. The data really don't show that the share of violent behavior that's associated with religion is large compared to the share of total social behavior associated with religion.
The result of this study says that people reporting a positive religious experience really have areas in their brain active that are active in other experiences people report as positive.
There's no more justification in history or in these studies for claims that religion is a disease that causes violence than there is for saying the same of commerce or love or any of a number of other basic human behaviors.