The horrors committed by so-called Christians consitute supreme blasphemy. They are not to be excused. They also are in direct opposition to Jesus Christ and His teachings, and they always were. Those who committed such atrocities, one might say, served Satan--certainly not God.
There are so-called Christians, in the world today, who do the same thing. In fact, these are false-Christians (I like faux--Christians, myself)
Whether or not contemporary Islam is analgous to this I don't know. Some say it is. Some say it isn't. Maybe Bin Laden et al. are faux--Muslims; I certainly hope so.
I myself tend to be Oprahized. I think that people can probably get to God by train, plane, automobile, flying carpet or what you will. However--for myself--Jesus Christ is the only One to Whom I am willing to entrust a matter of such importance, and , therefore, I am willing to accopt no other mediator, advocate, or guide.
I have asked Him to bring me to God, and I believe that He is doing that. I also believe that He will bring anyone.
There may be another way--but I'm not taking a chance on it. And furthermore, Jesus Christ is All that I want.
Some form of Islam may be a way for all I know.
However, you can be sure that Muslims who behave as Bin Laden and Al Qaida and these jihadists and the faux--Christians who commit similar acts are not worshipping God--and on some level they no doubt know it.
You claim to follow Christ yet you ignore his words.
John 14:6
Jesus saith unto him, "I am the way, the truth, and the life: no man cometh unto the Father, but by me."
Trains, planes, automobiles and flying carpets, cannot get you to God.