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The Koran covers quite a few different beliefs that the New Testament doesn't cover, like:

Qur’an 33.27 And He made you heirs to their land and their dwellings and their property, and (to) a land which you have not yet trodden, and Allah has power over all things.

Qur’an 21:44 Do they see Us advancing, gradually reducing the land (in their control), curtailing its borders on all sides? It is they who will be overcome.

Qur’an 9:123 “murder them and treat them harshly”

Qur’an 3.28 Let not the believers take the unbelievers for friends rather than believers; and whoever does this, he shall have nothing of (the guardianship of) Allah, but you should guard yourselves against them, guarding carefully; and Allah makes you cautious of (retribution from) Himself; and to Allah is the eventual coming.

Qur’an 3:56 “As for those disbelieving infidels, I will punish them with a terrible agony in this world and the next. They have no one to help or save them.”

Qur’an 4.89 They desire that you should disbelieve as they have disbelieved, so that you might be (all) alike; therefore take not from among them friends until they fly (their homes) in Allah’s way; but if they turn back, then seize them and kill them wherever you find them, and take not from among them a friend or a helper.

Qur’an 5:51 “Muslims, do not make friends with any but your own people.”

Qur’an 5:72 “They are surely infidels who say; ‘God is the Christ, the Messiah, the son of Mary.”

Qur’an 8:12 cp. 8:60 “Instill terror into the hearts of the unbelievers”; “smite above their necks and smite all their finger-tips off them”

Qur’an 2:191 “...kill the disbelievers wherever we find them”

Qur’an 9.33 He it is Who sent His Apostle with guidance and the religion of truth, that He might cause it to prevail over all religions.

Qur’an 2:193 “And fight with them until there is no persecution, and religion should be only for Allah”

Qur’an 8:71 And if they intend to act unfaithfully towards you, so indeed they acted unfaithfully towards Allah before, but He GAVE YOU MASTERY OVER THEM

Qur’an 8:55 Surely the vilest of animals in Allah’s sight are those who disbelieve.

Qur’an 22:19-22 “fight and slay the Pagans, seize them, beleaguer them, and lie in wait for them in every stratagem” “for them (the unbelievers) garments of fire shall be cut and there shall be poured over their heads boiling water whereby whatever is in their bowels and skin shall be dissolved and they will be punished with hooked iron rods”

Qur’an 48:13 Those who “believe not in Allah and His Messenger, He has prepared, for those who reject Allah, a Blazing Fire!”

Qur’an 3:54 “‘Lord, we believe in Your revelations (the Torah and Gospels) and follow this Apostle (Jesus). Enroll us among the witnesses.’ But the Christians contrived a plot and Allah did the same; but Allah’s plot was the best.”

Qur’an 8:12 “Your Lord inspired the angels with the message: ‘I will terrorize the unbelievers. Therefore smite them on their necks and every joint and incapacitate them. Strike off their heads and cut off each of their fingers and toes.”

Qur’an 8:58 “If you apprehend treachery from any group on the part of a people (with whom you have a treaty), retaliate by breaking off (relations) with them. The infidels should not think they can bypass (Islamic law or the punishment of Allah). Surely they cannot escape.”

Qur’an 8:7 “Allah wished to confirm the truth by His words: ‘Wipe the infidels (non-Muslims) out to the last.’”

Qur’an 8:39 “So, fight them till all opposition ends and the only religion is Islam.”

Qur’an 8:59 “The infidels should not think that they can get away from us. Prepare against them whatever arms and weaponry you can muster so that you may terrorize them. They are your enemy and Allah’s enemy.”

Qur’an 8:60 “Prepare against them (non-Muslims) whatever arms and cavalry you can muster that you may strike terror in the enemies of Allah (non-Muslims), and others besides them not known to you. Whatever you spend in Allah’s Cause will be repaid in full, and no wrong will be done to you.”

Qur’an 8:7 “Allah wished to confirm the truth by His words: ‘Wipe the infidels (non-Muslims) out to the last.’”

Qur’an 4:101 “The unbelievers (non-Muslims) are your inveterate foe.”

Qur’an 8:60 “Prepare against them (non-Muslims) whatever arms and cavalry you can muster that you may strike terror in the enemies of Allah (non-Muslims), and others besides them not known to you. Whatever you spend in Allah’s Cause will be repaid in full, and no wrong will be done to you.”

Bukhari:V4B56N814 “There was a Christian who embraced Islam and he used to write the revelations for the Prophet. Later on he returned to Christianity again he used to say: ‘Muhammad knows nothing but what I have written for him.’”

Qur’an 9.28 O you who believe! the idolaters are nothing but unclean, so they shall not approach the Sacred Mosque (Mecca) after this year;

I could go on and on, but you get the point. When dealing with muslims the "Golden Rule" is do unto them before they do unto you. Don't believe that?
Take a trip to Yemen or Egypt or Iran and have a discussion about which relgion is correct. Bet you a quarter they cut your head off.