The difference between Christians and Muslims is that Christians by and large stopped engaging in warfare and other forms of mass killing in the name of religion centuries ago.
The last one which comes to mind is the Thirty Years War occurring during the first half of the 17th century.
But Muslims are curently engaged in aggressive religiously-inspired wars of conquest against non-Muslims in Sudan, Indonesia, the Philippines, Nigeria, Pakistan, throughout the Middle East, Kashmir and almost everywhere in the Third World where Islam comes in contact with those whom Muslims consider infidels.
Even here in the West there are some causes for concern about Muslim populations.
Unlike the Bible, the Koran does not just concern itself with religion, but also contains sociopolitical and economic commandments regulating many aspects of everyday Muslim life.
Since the Koran mandates every Muslim to strive to extend Islam's dominion over non-Muslims there must always be a nagging doubt about where the individual Muslim's loyalties lay.
Does he consider himself to be a Muslim who just happens to be living in America or Britain or wherever, or does he look upon himself primarily as a loyal citizen of his country and, incidently, also a Muslim.
It's all a question of loyalty you see, and there is ample evidence that there is every reason to be asking that question.
For Christians, that was the 11th Commandment which Jesus himself said to "Love thy neighbor."
Compare and contrast Christ's teachings with that of Mohammed who says to "Kill thy non-Muslim neighbor."
There it is, in a nutshell.
Please cite some exhortations to war from the Bible.