There is a simple difference:
A Jew cannot shout "Abraham" or "Moses" or "G*d" is bigger when he kills - simply because of the Mosaic commandment "Thou shalt not kill".
A Christian may not scream "Jesus is bigger" while killing, simply because the same commandment goes for Christians and Jesus never killed, beheaded or cut off any parts of a human body.
Now there is Mohammed: He killed, he killed and saw is as a commandment of the Koran, Allah sent him out to proselytize and kill those who did not believe "in Allah and the "prophets" visions". And any Muslim MUST live his life like Mohammed did - thus making Muslims the same cruel robbers, thieves, rapers, child-abusers and killers as Mohammed! And if any Muslim ever shouts "Allahu Akbar", then yes it is justified by their religion and simply BECAUSE of their religion.
Do you thin Hitler killed Jews for being so Christian? I don't think so - he was an atheist later on!
Do you think Americans made war in Vietnam because of religion? There has never been any problem in the Buddhist-Christian relations.
Nor would a Hindu kill for the religion itself - a Hindu may kill as a defense and when they kill Muslims it is because the Muslims provoked them heavily!
So do not confuse people killed during a war with filthy killings for nothing (because Islam IS NOTHING)!!! Hitler may be a good example of comparing maniac killings and filthy bestial character with those of Islam but let's not forget that he had an enormous sympathy for Muslims. He met with the Mufti of Jerusalem and he never touched the big mosque of Berlin in all these years! Just because the already existing group of Muslims in Berlin were loyal to Hitler! Just to see how close Muslims and Nazis have always been!