> Every part of the Quran that involves violence has consistently been understood to apply to a specific context, by almost all classical Islamic theologians and jurists.

That fully depends on which interpretations you follow. Islam not having a central authority means there is no 'central source' for how to interpret the scripture - Quran but also Hadith and Sunnah - and with that those who are set on taking what is written as the direct and unchanging word from God can claim to have as much justification (or, as they claim, more justification) as those who want to interpret scripture in a more 'modern' fashion.

Here's a sample of Quranic passages which call for muslims to 'fight unbelievers' which are followed to the letter by those who adhere to the literal interpretation of the texts:

https://quran.com/2?startingVerse=190: Fight in the cause of Allah ˹only˺ against those who wage war against you, but do not exceed the limits. Allah does not like transgressors.

https://quran.com/2?startingVerse=191: Kill them wherever you come upon them and drive them out of the places from which they have driven you out. For persecution is far worse than killing. And do not fight them at the Sacred Mosque unless they attack you there. If they do so, then fight them—that is the reward of the disbelievers.

Those who follow the literal interpretation of the texts see 'those who wage war against you' as all 'unbelievers' - those who live in the 'dar al-harb' (land(s) of strife or war) in contrast to those who live in 'dar al-islam' (land(s) under islamic law), especially those who live in places which have been conquered 'for islam' before but taken back later - e.g. 'Al-Andalus', better known as Spain. The main 'problem' in the interpretation of these lines is what is meant by 'those who wage war against you' as this can be interpreted as 'those who refuse to accept islam' in the context of the texts.

https://quran.com/4?startingVerse=74: Let those who would sacrifice this life for the Hereafter fight in the cause of Allah. And whoever fights in Allah’s cause—whether they achieve martyrdom or victory—We will honour them with a great reward.

https://quran.com/4?startingVerse=88: Why are you ˹believers˺ divided into two groups regarding the hypocrites while Allah allowed them to regress ˹to disbelief˺ because of their misdeeds? Do you wish to guide those left by Allah to stray? And whoever Allah leaves to stray, you will never find for them a way.

https://quran.com/4?startingVerse=89: They wish you would disbelieve as they have disbelieved, so you may all be alike. So do not take them as allies unless they emigrate in the cause of Allah. But if they turn away, then seize them and kill them wherever you find them, and do not take any of them as allies or helpers,

https://quran.com/4?startingVerse=90: except those who are allies of a people you are bound with in a treaty or those wholeheartedly opposed to fighting either you or their own people. If Allah had willed, He would have empowered them to fight you. So if they refrain from fighting you and offer you peace, then Allah does not permit you to harm them.

https://quran.com/4?startingVerse=91: You will find others who wish to be safe from you and their own people. Yet they cannot resist the temptation ˹of disbelief or hostility˺. If they do not keep away, offer you peace, or refrain from attacking you, then seize them and kill them wherever you find them. We have given you full permission over such people.

These lines can be interpreted as calling for offensive actions against 'unbelievers' - and here it is important to know what the Quran says about its predecessor religions:

https://quran.com/3?startingVerse=65: O People of the Book! Why do you argue about Abraham, while the Torah and the Gospel were not revealed until long after him? Do you not understand?

https://quran.com/3?startingVerse=66: Here you are! You disputed about what you have ˹little˺ knowledge of, but why do you now argue about what you have no knowledge of? Allah knows and you do not know.

https://quran.com/3?startingVerse=67: Abraham was neither a Jew nor a Christian; he submitted in all uprightness and was not a polytheist.

According to islamic doctrine the 'people of the book' were given the 'true word of God' but strayed from the path. Christians, i.e. those who believe in the 'holy trinity' of the Father, Son and Holy Ghost - are 'polytheists' since they worship others besides Allah. Taken together these lines are interpreted as cause to fight 'unbelievers'. This is explained in more detail in chapter 'O' (Justice) of 'The Reliance of the Traveller' [1] in the section on jihad:

Jihad means to war against non-Muslims, and is etymologically derived from the word mujahada , signifying warfare to establish the religion. And it is the lesser jihad. As for the greater jihad, it is spiritual warfare against the lower self (nafs), which is why the Prophet (Allah bless him and give him peace) said as he was returning from jihad,

“We have returned from the lesser jihad to the greater jihad.”

The scriptural basis for jihad, prior to scholarly consensus (def: b7) is such Koranic verses as:

(1) “Fighting is prescribed for you” (Koran 2:216);

(2) “Slay them wherever you find them” (Koran 4:89);

(3) “Fight the idolators utterly” (Koran 9:36);

and such hadiths as the one related by Bukhari and Muslim that the Prophet (Allah bless him and give him peace) said:

“I have been commanded to fight people until they testify that there is no god but Allah and that Muhammad is the Messenger of Allah, and perform the prayer, and pay zakat. If they say it, they have saved their blood and possessions from me, except for the rights of Islam over them. And their final reckoning is with Allah";

and the hadith reported by Muslim,

“To go forth in the morning or evening to fight in the path of Allah is better than the whole world and everything in it.”

There are many more such passages which can be and are interpreted in many ways so as to fit the purposes of those who lead others. It is the absence of a 'true and leading interpretation' which disavows war and conquest in the name of islam which gives rise to islam's specific problems when it comes to violence.

Read the Quran, 'Reliance of the Traveller' (the classical manual on shariah law) and the Sunnah and you'll understand just how open these texts are to interpretation. It is also illustrative to have a look at the history of islam and islamic countries.

[1] https://archive.org/details/relianceofthetravellertheclassic...