In history people who called themselves christians did cruel things like muslims do today if not worse than what the muslims do today.
However, christianity is capable of making gentiles be righteous and moral people if followed with the right heart.
Islam on the otherhand is a satanic religion which is the anti Jewish religion. Much like the chrisitians believe in a christ and antichrist. Islam never does good and it is a monotheistic religion which perverts righteousness and goodness and morality.
Christianity followed by the proper heart is not supposed to do that. Correct me if I'm wrong.
I think as Christians we have to accept that in the past we have treated the Jews pretty badly to say the least.
I don't believe that you're wrong though. I believe anyone who follows the teaching of Christ is a Christian, "He who has my commandments, and obeys them, it is he who loves me" (John 14:21).
Anyone who claims to be Christian who goes around killing Muslims, Jews, and Protestants can hardly be called Christian. A Christian follows Christ, that's why they call them Christians. The principle that you follow should be the title that you hold. To be a Christian you must follow the Bible (all of the bible). And since the Bible does not promote the kind of violence that the Crusaders did, that the Nazis did, that the Spanish did, we must conclude that they did not follow good Christian principles. For that, they are responsible for their action, and not Christianity.
There have been many in the past who have killed innocent people, Jews, Muslims and others in the name of Christianity though. Who is to blame? Are they responsible as individuals for their actions? Are their superiors? Their nation? Their religion? How do we know they had a religion and followed it? What does their scriptures say about their actions?
Anyone who follows anything apart from the Bible cannot claim to be a Christian. It is my view that Mormons cannot claim to be Christians as they follow the false teachings of a deceived Joseph Smith that are in direct opposition to the Bible and what Jesus said taught and practiced during his lifetime, and what the prophets and apostles said and did. It is also my view that the Church of Rome is not the Church of G-d. Catholics and many other faith denominations calling themselves Christians have been deceived and are following church doctrine instead of the word of Christ and what the Bible says. Catholicism is almost a separate and distinct religion in its own right completely separate from the teachings of Christ and what the Bible says. Its more based around church doctrine, tradition, rituals and practices and what the Pope says.
As for Christianity or Islam, for me as a Christian its a no brainer. Their G-d is not our G-d. The teachings are diametrically opposed to each other so they simply can not be the same G-d. Only one can be truth.
“Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Therefore by their fruits you will know them. Matthew 1:7
Cheers,
John