Quote
"Pickthall: 52So obey not the disbelievers, but strive against them herewith with a great endeavour."
"Pickthall: 55(And remember) when Allah said: O Jesus! Lo! I am gathering thee and causing thee to ascend unto Me, and am cleansing thee of those who disbelieve and am setting those who follow thee above those who disbelieve until the Day of Resurrection. Then unto Me ye will (all) return, and I shall judge between you as to that wherein ye used to differ. 56As for those who disbelieve I shall chastise them with a heavy chastisement in the world and the Hereafter; and they will have no helpers."

Kaafir is an Islamic term of Arabic origin used by Muslims to refer to non-Muslims who deny the God in Islam, reject his authority, and do not accept the message of Islam as truth
"Pickthall: 52So obey not the disbelievers, but strive against them herewith with a great endeavour."
"Ali: 29Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued."
"Ali: 28O ye who believe! The idolaters only are unclean. So let them not come near the Inviolable Place of Worship after this their year. If ye fear poverty (from the loss of their merchandise) Allah shall preserve you of His bounty if He will. Lo! Allah is Knower, Wise."
"Remember thy Lord inspired the angels (with the message): "I am with you: give firmness to the Believers: I will instil terror into the hearts of the Unbelievers: smite ye above their necks and smite all their finger-tips off them." This because they contended against Allah and His Messenger: If any contend against Allah and His Messenger, Allah is strict in punishment. Thus (will it be said): "Taste ye then of the (punishment): for those who resist Allah, is the penalty of the Fire."
"Ali: 17It is not for such as join gods with Allah, to visit or maintain the mosques of Allah while they witness against their own souls to infidelity. The works of such bear no fruit: In Fire shall they dwell."
"For the worst of beasts in the sight of Allah are those who reject Him: They will not believe."