Quote
"Pickthall: 52So obey not the disbelievers, but strive against them herewith with a great endeavour."
"Pickthall: 89And when there cometh unto them a scripture from Allah, confirming that in their possession - though before that they were asking for a signal triumph over those who disbelieved - and when there cometh unto them that which they know (to be the truth) they disbelieve therein. The curse of Allah is on disbelievers. 90Evil is that for which they sell their souls: that they should disbelieve in that which Allah hath revealed, grudging that Allah should reveal of His bounty unto whom He will of His slaves. They have incurred anger upon anger. For disbelievers is a shameful doom."

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."