What this is referring to is Christians being in union with Christ. Notice that Jesus did not say “Why do you persecute My church”. We also can similar sayings in the gospels in Matthew 25:40. Should we take this to mean that when Jesus identifies Himself with His followers that His followers are actually Jesus Himself?
If Christ is the church as i understand the quote above, then it follows that it was Jesus who was involved in the inquisition and various other acts of evil in the catholic church to.
I think we agree that this verse is a reference to Christians in union with Christ. This is how we understand His Body to be. Yes, I notice that
Acts 8:3
3 But Saul was ravaging the church, and entering house after house, he dragged off men and women and committed them to prison."
Saul was ravaging the church. Jesus confronts Saul saying “why are you persecuting ME”. Jesus identifies Himself with His Body, the Church, which Saul was ravaging. We should take this to mean:
Rom 12:5
5 so we, though many, are one body in Christ, and individually members one of another."
I disagree with your premise that the Inquisition was evil, in and of itself, however, that is an issue for another thread. I will say that Jesus is not responsible for anyone’s sin, and that sins were committed during the Inquisition. Saying this is Jesus’ responsibility is like saying it is your fault if you find you have a tumor growing in your innards. It does not belong there, and brings illness and death, but since it is in your body, it is your fault.
Does this mean Christ is only present in a catholic when they are without sin or just venial sin?
this probably belongs in another thread also. Sin is a refusal or rebellion against grace. When a person sins, it separates him from God. The more sin, the more grace is lost, until one can eventually separate one’self from God’s grace entirely. This is why the Catholic church teaches that salvation can be lost.