[ Well, there was a lot of violence in the “wars of religion” of the 16th century, most of it from of attacks on Catholics by the various Protestant groups, since Protestantism split up fairly early in its career. These groups included the Huguenots, the Anglicans and the Calvinists (who mostly attacked other Protestants). This of course was followed up by attacks from Catholics on Protestants. In many cases, including the inter-Protestant attacks, there was a secular political element on either side.
The main difference between Christianity and Islam is simply that this is never justified in Christian scriptures, whereas Islamic writings are one long violent screed. Oh - and the fact that Christianity is true and Islam is not... ]
Great Point, we as Christians can condemn the bad behavior of some of our fellow Christians in the past precisely because their action were antithetical to the actual founding days of the religion of Christianity.
And the Protestants were every bit as vicious agains the Catholics.