Fight 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.

Allah then commanded fighting the disbelievers when He said:

(...until there is no more Fitnah) meaning, Shirk. This is the opinion of Ibn `Abbas, Abu Al-`Aliyah, Mujahid, Al-Hasan, Qatadah, Ar-Rabi`, Muqatil bin Hayyan, As-Suddi and Zayd bin Aslam.

Allah's statement:

(...and the religion (all and every kind of worship) is for Allah (Alone).) means, `So that the religion of Allah becomes dominant above all other religions.' It is reported in the Two Sahihs that Abu Musa Al-Ash`ari said: "The Prophet was asked, `O Allah's Messenger! A man fights out of bravery, and another fights to show off, which of them fights in the cause of Allah' The Prophet said:

(He who fights so that Allah's Word is superior, then he fights in Allah's cause.) In addition, it is reported in the Two Sahihs:

(I have been ordered (by Allah) to fight the people until they proclaim, `None has the right to be worshipped but Allah'. Whoever said it, then he will save his life and property from me, except for cases of the law, and their account will be with Allah.)

Fight them till there is no sedition, no idolatry, and the religion, all worship, is for God, alone and none are worshipped apart from Him; then if they desist, from idolatry, do not aggress against them. This is indicated by the following words, there shall be no enmity, no aggression through slaying or otherwise, save against evildoers. Those that desist, however, are not evildoers and should not be shown any enmity.

Fight those who don't believe in God nor in the Last Day [Unless they believe in the Prophet God bless him and grant him peace] nor hold what is forbidden that which God and His emissary have forbidden [e.g., wine] nor embrace the true faith [which is firm, and abrogates other faiths, i.e., the Islamic religion] from among [for distinguishing] those who were given the Book [i.e., the Jews and Christians] unless they give the head-tax [i.e., the annual taxes imposed on them] (/'an yadin/) humbly submissive, and obedient to Islam's rule.^[1]

"The theory that our religion is a peaceful and loving religion is a wrong theory...The Holy war as it is known in Islam is basically an offensive war, and it is the duty of all Muslims of every age, when the needed military power is available, because our prophet Muhammad said that he is ordered by Allah to fight all people until they say ‘No God but Allah,’ and he is his messenger...It is meaningless to talk about the holy war as only defensive, otherwise, what did the prophet mean when he said, "from now on even if they don’t invade you, you must invade them.""

"Jihad Against the Kuffar is of two Types: Offensive Jihad (where the enemy is attacked in his own territory) ... [and] Defensive Jihad. This is expelling the Kuffar from our land, and it is Fard Ayn [personal religious obligation on Muslim individuals], a compulsory duty upon all ... ...Where the Kuffar [infidels] are not gathering to fight the Muslims, the fighting becomes Fard Kifaya [religious obligation on Muslim society] with the minimum requirement of appointing believers to guard borders, and the sending of an army at least once a year to terrorise the enemies of Allah. It is a duty of the Imam (Caliph) to assemble and send out an army unit into the land of war once or twice every year. Moreover, it is the responsibility of the Muslim population to assist him, and if he does not send an army he is in sin.- And the Ulama have mentioned that this type of jihad is for maintaining the payment of Jizya. The scholars of the principles of religion have also said: " Jihad is Daw'ah [Islamic preaching] with a force, and is obligatory to perform with all available capabilities, until there remains only Muslims or people who submit to Islam."^[2]

The penalties that the Sharia has introduced for those who disobey God and his Messengers of two kinds: the punishment of those who are under the sway [of an imam], both individuals and collectivities, as has been mentioned before [in the chapter on criminal law], and, secondly, the punishment of recalcitrant groups, such as those that can only be brought under the sway of the Imam by a decisive fight. That then is the jihad against the unbelievers (kuffar), the enemies of God and His Messenger. For whoever has heard the summons of the Messenger of God, Peace be upon him, and has not responded to it must be fought, "until there is no Fitna and the religion of God's entirely" (K. 2:193, 8:39).^[3]

"Since lawful warfare is essentially Jihad and since its aim is that religion is entirely for Allah and the word of Allah is uppermost, therefore, according to all Muslims, those who stand in the way of this aim must be fought.^[4]

Shariat can be fostered through the sword.

Kufr and Islam are opposed to each other. The progress of one is possible only at the expense of the other and co-existences between these two contradictory faiths in unthinkable.

The honor of Islam lies in insulting kufr and kafirs. One who respects kafirs, dishonors the Muslims. To respect them does not merely mean honouring them and assigning them a seat of honor in any assembly, but it also implies keeping company with them or showing considerations to them. They should be kept at an arm's length like dogs. ... If some worldly business cannot be performed without them, in that case only a minimum of contact should be established with them but without taking them into confidence. The highest Islamic sentiment asserts that it is better to forego that worldly business and that no relationship should be established with the kafirs.

The real purpose in levying jizya on them is to humiliate them to such an extent that, on account of fear of jizya, they may not be able to dress well and to live in grandeur. They should constantly remain terrified and trembling. It is intended to hold them under contempt and to uphold the honor and might of Islam.
. . .

Whenever a Jew is killed, it is for the benefit of Islam.^[5]

The most beloved of deeds in the eyes of Allah are: offering prayers at the stipulated times; goodness and kindness towards parents; Jihad in the way of Allah.

Thawban narrated that the Messenger of Allah (s.a.w) said: "When the sword is imposed on my Ummah, it shall not be removed from it until the Day of Resurrection."