Matthew 7:19-23- "Every tree that bringeth not forth good fruit is hewn down, and cast into the fire." Wherefore by their fruits ye shall know them. Not every one that saith unto me, Lord, lord, shall enter into the kingdom of heaven but he that doeth the will of my father which is in heaven. Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? And then I will profess unto them, I never knew you: depart from me, ye that work iniquity."
So, some people think that they are living for God but they aren't bringing forth good fruit and they think they are doing what is right.
Galatians 5:22- "but the fruit of the Spirit is love, joy, peace, long-suffering, gentleness, goodness, faith, Meekness, temperance: against such there is no law."
Jude 4 says: "For there are certain men crept in unawares, who were before of old ordained unto this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ."
Titus 1:16 says- "They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate."
There are going to be alot of professing Christians who will be shown to not really know Jesus. There will be alot of professing Muslims who are serving Christ.
Romans 2:13-15- "(For not the hearers of the law are just before God, but the doers of the law shall be justified. For when the Gentiles which have not the law, do by nature the things contained in the law, these, having not the law are a law unto themselves: Which show by nature the work of the law written in their hearts, their conscieb=nce also bearing witness, and their thoughts the mean while accusing or else excusing one another.)
It is always wrong to judge people as a group. People are individuals. Also
Matthew 24:40 says that "Then shall two be in the field; the one shall be taken, and the other left."
Those two people were friends. They were probably the same religion. I doubt that one was a Christian and the other a Muslim.
There have been holy wars before in the name of "Christianity." when the Popes would kill anyone who would not convert to Christianity. The Muslims have very strong moral standards. They hate America because of all th e pornography and immorality in the movies. They really do think that they are doing good and cleansing the world of evil. Of course many Muslims probably do not approve of the killing. Many of the Muslims probably really are good people.