And yet from the time it achieved the kind of power in any society from which to exert substantial influence well into the modern period, Christians were killing people -- in other countries, in their own countries, etc. -- in the name of Christ all the time. The Crusades (and not just the ones in the "Holy Land" and/or targeting Muslims) were a thing. The Inquisition was a thing. Europe's Wars of Religion were a thing. There is a reason the word "pogrom" exists.

The modern Western concept of freedom of religion isn't a direct product of some religious parallel to the Ruby's community's maxim "Matz Is Nice And So We Are Nice", its a product of the exhaustion of Western European Christians after more than a millenium of killings -- not least of all of Western European Christians by Western European Christians -- in the name of Christ.

The idea that Christianity is somehow inherently more peaceful than Islam requires ignoring pretty much the entirety of the history of Christianity.