Haq never causes Fitnah
Hazrat Maulana [Shabbir Ahmad Usmani] (ra) used to say that if Haqq [a truthful word], in a truthful [proper] manner [of conveying], with a truthful [sincere] intention, is said, then it will never cause fitna. But there are these three conditions, first is that what is being said is the truth, second is that the intention is correct, and the third is that the manner [of conveying the message] is proper.
So if you happen to see anywhere that due to speaking the truth some fitna is arising, or any dispute or argument, then know that from amongst these 3 conditions a condition was unfulfilled: either the message was not the truth; or the niyyah was improper, as the message was the truth but was said with a wrong intention. [For example] the purpose was to show-off or to make oneself be seen as higher, or to lower another; so the niyyah was wrong. Or if the niyyah was also correct then the method [by which the message was conveyed] was incorrect.
If the method was correct, the niyyah was correct, and the message was the truth then it would not have caused fitna. Eventually at one time or another, [the message] would have had its effect but it would not have created fitna.
Translated (from Urdu) from a talk entitled Maulana Abul Hasan Ali Nadwi: Lessons from His Life delivered in England on July 30, 2000 by Shaykh Mufti Taqi Usmani (db) at a symposium to commemorate the life of Shaykh Abul Hasan Ali an-Nadwi (ra).