Wait a minute folks. Slow down here.
The Muslim Scriptures command killing to spread their religion. That is vastly different from the Christian Scriptures.
Now, if the Muslim RELIGION is condemned for what its Scriptures promote, that is fair. This does not mean all, or even most, Muslims agree with or follow all of their Scriptures. But in the case of Islam, those who are doing the killing (whether or not we call them extremists) seem to be following their own Scriptures more faithfully than others.
With Christians it is exactly the opposite. Those who follow the Scriptures the most closely are the most humble and quiet and servant-like, as our Lord was. This doesn't mean all, or even the majority, are like this, but that is where the Scriptures direct us.
Scriptural Islam is a killer religion.
Scriptural Christianity is a healing religion.
A world of difference.
Lots of organizations use the name Christian but are not: Catholics, Mormons, JW's, Unity, etc. etc. But yes, the world probably will lump us all together because of that.
Now, about the Church of England -- originally it was simply a split between the Pope and King Henry VIII. There was no basic split in doctrine. His daughter, Mary, took the throne as a staunch Catholic and proceeded to massacre anyone not resubmitting to the Catholic faith. Verification is in Foxe's Book of Martyrs, which centers on this period. Elizabeth, after Mary, responded to the violence with a lesser degree of violence, but violence nevertheless. It was at this time that the split with Roman Catholicism grew more distinct. The issues mentioned by InHim have arisen since then. But at the time of the Reformation in England, the issues that were prominent had to do with the position of the clergy and the availability of the Bible in the vernacular. The next issue was, I believe Mary, but I would have to look that up.
The Reformation in England was fueled, however, also by the previous fiery writings of Wyclif who was condemned in 1377 by the Pope over issues such as transubstantiation and the mediating priesthood as well as the sacrificial mass. Wyclif thus preceded Luther on some very major issues, but they were pretty much confined to an elite group who argued them in private.
The year following Wyclif's condemnation by the Pope, the Papal Schism followed and Wyclif's arguments were pretty much lost in that confusion.
Hus, however, followed him and was the spark that started the "Bohemian Rebellion". He was burned at the stake by the Catholic church as a heretic for proclaiming salvation by grace in 1415.
So while this was all an undercurrent of rebellion against the Catholic church, the split via Henry was not over doctrine per se but over his right to remarry. He thus declared himself head of the church in England and there were no doctrinal challenges. They had come before him and would come after, but at its inception the Church of England had no basic doctrinal differences from the Catholic Church.
It would not be for a century that the Puritans would rebel against the Church of England and be persecuted and leave the country because of that.
This is why I said that the Church of England, at the time of the Reformation, was basically Catholic -- it was.