People of hypocrisy and confusion have claimed all these calamities that have befallen the Muslim Ummah is because of our sins, so it’s not allowed for us to fight unless we clean our rows from sinners.

In replay to this false claim, it’s said:

FIRSTLY, This contradicts common sense, because it’s impossible to be free of sinners and we admit that all what happens to us, is because of sins. But it does not mean that we can not repel a harm, unless we repel the other harm. It’s like a person who is injured in a car accident because he hadn’t security belts on, so imagine a doctor saying: “Go and learn how to use the security belt, then we can treat your injuries.”

SECONDLY, Imaam Ibn Taymia said in “Majmu al-Fatawa“, 28/506-507:
“Those who fight the enemy have agreed upon the perfect form of jihaad and it’s the purpose of pleasing Allaah, dignifying His word and establishing His religion and obeying His Messenger, even if there is immorality and corruption of intention amongst them, like their fighting for the sake of authority or transgressing against them in some matters. And when the harm of abandoning the fight against them is greater for the religion than the harm of fighting in this way, then it becomes obligatory to repel the greater harm by accepting lesser harm. And it’s from the usul of Islaam that should be given proper attention!
That’s why it was from the usul of Ahlus-Sunnah wal-Jama’ah to fight with all good and bad Muslims and indeed Allaah helps sometimes this religion with bad people and even with corrupted nations as the prophet informed us about it. And if the fighting can not be achieved except with help of corrupted leaders and soldiers most of them being fajirs, then we have two situations here: either to abandon fighting with such Muslims, and it means invasion of others whose harm is greater for the religion and for worldly life, or to fight with a corrupted leader and by doing so we repell those who are more corrupted and we establish the most parts of Islaamic Shari’ah if it’s not possible to establish the whole Shari’ah and it’s obligatory to do it in such situations or similar situations. And most of the battles that happened after righteous khalifas didn’t differ from this case.”

Some may say: “Ok! but innovation is not like other sins, it’s worse than that and salaf did clearly warned us against befriending them and using their help in Jihaad”

And they cited some sayings of scholars (not Qur’aan or Sunnah) as a proof:

Ali ibn Bakaar said: “Ibn Awn sent some money to me and I divided it in the way of Allaah and he said: “Don’t give a Qadari anything” and I think he said as well “Do not do battle alongside them with you for they will not be given victory.” [Ibn Abi 'Asim, "as-Sunnah", p.88]

‘Umar bin Abdul ‘Aziz said: “Do not go to battle alongside Qadari, because you will not be given victory because of them” [Ibn Batta, "al-Ibaana", # 1848]

Similar words are reported from Imaam Ahmad about Jahmia. (Ibn Muflih, “al-Adab ash-Shari’yya“, 1/256)

In reply to this, it’s said: This is not a proof against the issue, because:

FIRSTLY, These quotes are irrelevant because it’s not a proof that seeking aid of a mubtadi’ is forbidden, rather it’s a proof that sects like qadaria and jahmia were not considered Muslims by early Muslim scholars, like Ibn Abbas, Mujahid, Ibn ‘Umar, ‘Umar bin Abdul ‘Aziz, Malik bin Anas, Sufyan as-Sawri, Abdullaah bin Mubarak, Ahmad bin Hanbal and others treated “qadaria” as kuffar…

Ibn Battah relates from ‘Umar bin Abd al-’Aziz: “Abu Suhayl bin Malik said: “One day I was accompanying ‘Umar bin Abd al-’Aziz and he asked me: “What is your opinion about qadaris?” I said: “I think we should demand that they repent, if they repent good, otherwise I would behead them” ‘Umar said: “it’s also my opinion!” Narrators Ma’an and Qutayba said: “Malik said: “It’s my opinion as well!” ["al-Ibaana", 2/233 (1834) Dar ar-Raya, Riyad, 1410]

And it’s related from Imaam Ahmad about jahmiyya that they were kuffar.

SECONDLY, All what salaf said about seeking aid from ahlul bid’a and hawa, then it should be applied to ‘Jihaad ul Talab,’ when you are initiating war and not when Jihaad is obligatory upon every single Muslim, even women, old people, children who are able to fight.

THIRDLY, Scholars have allowed seeking help from people of innovations and we have full of exemples in the history.

Imaam Muhammad bin al-Hasan al-Shaybani said:
“There is no problem for righteous muslims to fight alongside khawarij against mushriks..”

And Imaam as-Sarakhsi commented upon these words:
“Because they fight know to repell the harm of kufr and to make Islaam superior and this fighting is an obligatory kind of fighting, it’s dignifying the Word of Allaah!” ["Sharh Siyar al-Kabir", 4/# 2970]

And it’s narrated from ‘Ali that he said about khawaarij:
“We will not hinder you from taking from what you earned in Jihaad”

And Imaam as-Sarakhsi commented on these words:
“It proves that if khawaarij fight ágainst disbelievers under the banner of righteous muslims, they deserve their share from the booty as the others deserve, because they are muslims.” ["al-Mabsut", 10/125-126]

Imaam Ibn Taymia said in “Majmu al-Fatawa“, 28/212:
“If establishing the obligations such as education, Jihaad and other obligations besides that becomes impossible except with the help of one who has bid’a and its harms are less than the harms of leaving the obligation: So obtaining the interest of the obligation - even if it has some evil as a result - is better than the opposite of this (i.e. abandoning ahlul bid’a).

And we know from the history that when Fatimis ruled in Egypt whey were kuffar according to all Muslim scholars. So when Abu Yazid revolted against Banu Ubaydullah, all Sunni scholars agreed to help Abu Yazid, although he was a heretic khariji.

Imaam az-Zahabi writes:

“Faqihs and devoted worshipers began preparing with drums and banners with a great zeal and Ahmad bin Abil-Walid addressed them in a Friday sermon and encouraged them. He said: “Fight those who disbelieved in Allaah and who claims to be a Lord besides Allaah and he changed Allaahs laws and cursed His prophet and his companions. And people burst into tears. And he said: “O Allaah! This Qarmati (batini) is kaafir known as Ibn Ubaydullah, claimant to the lordship, a denier of your blessings, who disbelieves in Your Lordship, who abuses Your Messenger, who discredits Your prophet Muhammad and sheds blood of Muslims. Curse him and humiliate him and send upon him Your anger every morning and every night!” Then he stepped down and led them in the friday prayer.” ["Siyar Alam an-Nubala", 15/155 Muassasa ar-Risala]

And it was Abu Yazid Makhlad bin Kidad al-Khariji who initiated this uprising against kaafir fatimis and Sunni scholars supported them. And az-Zahabi writes:

“Abu Ishaq al-Faqih joined Abu Yazid in latter revolt and he used to say: “They are from ahlul qiblah, but those (i.e. fatimis) are not ahlul qibla, rather they are Banu Aduwullah (sons of Allaahs enemy) If we win with them, we will not obey Abu Yazid, because he is a khariji.” ["Siyar Alam an-Nubala", 15/155]