His point is that any religion that explicitly calls for the INITIATION of force in its sacred texts is invalid.
Anyway, regarding the Christian examples...
Crusades: Counterattack in a much larger and longer war.
Witch Burnings: If there really exist people who are cursing and killing others through dark magic, what would you do with them?
Abortion Clinic Bombings: Small number of people explicitly, clearly and loudly condemned by the overwhelming majority of their co-religionists. Abortion clinic bombing also can't be justified using the Gospels or the Catechism.
"His point is that any religion that explicitly calls for the INITIATION of force in its sacred texts is invalid."
Read the 3rd chapter of Deuteronomy lately? The Old Testament of the Bible, while Jewish in origin, is still read by Christians as a sacred text. But I guess if the Caananites followed evil, false gods it was okay to slaughter them and take their land.
As to the horrors of the 'Burning Times' (as today's neopagans like to call them) there's little historical doubt that a few hundred folks who actually believed themselves to be in league with you-know-who were running around Europe, along with a few tens of thousands of holdout pagans.
Millions died horribly, all in the name of God, including St. Joan herself.