How can you reconcile the Inquisition with the fact that God is love?

The Catholic Answers

The fact that God is love does not forbid the imprisonment of a criminal nor the hanging of a murderer. If love for the murderer does not prompt it, at least love for law and order, and love for other citizens suggests it. I am obliged to love my enemies, but not their crimes. Christ loved His enemies and prayed for them. Yet He told them that if they died in their sins they would be cast into hell for all eternity. Love does not forbid the punishment of crime. It insists that there should be some punishment so that men will not easily commit it.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty