1 John 2:19 They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.
1 John 2:18 Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
Matthew 8:11-12
And I say unto you, That many shall come from the east and west, and shall sit down with Abraham, and Isaac, and Jacob, in the kingdom of heaven. But the children of the kingdom shall be cast out into outer darkness: there shall be weeping and gnashing of teeth.
1 John 2:22-23
Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. Whosoever denieth the Son, the same hath not the Father: he that acknowledgeth the Son hath the Father also.
While Christianity recognizes the Hebrew Bible (called the Old Testament by Christians) as part of its scriptural canon, Judaism does not recognize the Christian New Testament. The relative importance of belief and practice constitute an important area of difference.
Muslims believe that Jesus (called “Isa” in Arabic) was a prophet of God and was born to a virgin (Mary). They also believe he will return to Earth before the Day of Judgment to restore justice and defeat al-Masih ad-Dajjal, or “the false messiah” — also known as the Antichrist.
Didn't they both deny Christ? Isn't it clear, then, who is of the devil and who isn't? But should we despise them as Christians?
I'll just remind you because I'm sure you already know these things better than I do.
Matthew 5:43-45
Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.