Given that Christianity is morally opposed to most forms of violence, it can be reasonably assumed that violent people are either not educated or simply not faithful. For most individuals, that doesn't really say a lot. We all have our flaws, so although all Christians certainly need to pursue a peaceful life (Romans 12:18), a few failures are to be expected.
But what about when we go beyond the human level? The Catholic Church has a history of intentionally suppressing the Bible. Indeed, it was a punishable offence for unauthorised individuals to own or translate a Bible. As William Tyndale found out the hard way, that punishment was rather brutal. Specifically, Tyndale was strangled and burned at the stake. This single murder is two strikes against the Catholic Church.
In the crime drama "Dexter", the titular character is a serial killer, but with a twist: He only kills bad people. Specifically, other killers. An interesting quote from him: "if you ask me, I'm a bargain." These words were spoken to James Doakes, a police officer taken captive by Dexter after a failed attempt to catch him. They were discussing the morality of their actions. Dexter reasons that, whereas Doakes kills "when I have to, on the job", he only kills the ones who slip through the cracks, and does so for free.
So, a question: Can Dexter claim to be acting on the authority of the government? What's interesting is that he actually can, when he is on the job as a forensics blood spatter analyst. When it is his job to demonstrate the guilt of a defendant, resulting in the arrest and conviction of said defendant, Dexter is acting on the authority of the government. But the moment he takes matters into his own hands and kills a killer without the consent of the government, Dexter is committing a crime, and is himself worthy of punishment.
In the same way, the Catholic Church can do good things. When they defend good, Biblical doctrines, they are doing good for God. But when they killed what they called "heretics", whether they were actually killing a heretic or not, they were sinning, doing the exact opposite of what the word tells the to do.
But it wasn't just heretics they killed. Tyndale's death wasn't the result of preaching bad, unBiblical doctrine, but rather attempting to make the Bible accessible to more people. Tyndale's goal was to ensure a plough boy could know more of the scriptures than a Bishop. The Catholic Church's goal was to stop that from happening.
What we see, then, is that we don't even need the Bible to show that the Catholic Church is not a Christian entity. The Hellish lengths they went to just to prevent Christians from accessing the Bible are the actions of Satan's Church, not Christ's.
No one living can be blamed for the death of William Tyndale, but the evidence shows that the Catholic Church has learned precious little from this. Although it is no longer a capital crime to translate the Bible, nor are Catholics forbidden from owning one, they are still discouraged from studying it without the aid of the Catholic Church. Captivity through violence has merely been replaced with captivity through deception. By neglecting the scriptures in favour of Catholic doctrine, Catholics continue to spit in the face of William Tyndale to this very day.