Only when the differences are accompanied by prejudices and...
Only when the differences are accompanied by prejudices and emotional and illogical alignments, and lead individuals to slander, defame, and treat one another with contempt, instead of motivating them to endeavour towards reforming themselves, that they are a cause of misfortune.
In the Shi'ite faith, the people are obliged to imitate a living mujtahid, and the mujtahidun are obliged to independently ponder the issues and form their independent opinions and not to be content with what has been handed down by the ancestors. Ijtihad and independence of thought inherently lead to difference of views; but this divergence of opinions has given life and dynamism to the Shi'ite fiqh . Therefore, difference in itself cannot be condemned.
What is condemnable is the difference which originates in evil intentions and selfish interests, or when it centres around issues which drive Muslims on separate paths, such as the issue of imamah and leadership, not the difference in secondary and non-basic matters.
To undertake an examination of the intellectual history of the Muslims so as to find which differences originated in evil intentions, vested interests, and prejudices, and which were a natural product of their intellectual life, whether all points of difference in the sphere of kalam should be regarded as fundamental, or whether all problems in fiqh should be regarded as secondary, or if it is possible that a difference in kalam may not be of fundamental significance whereas one in fiqh may have such importance - these are questions which lie outside the brief scope of this lecture.
Before we take up the schools of kalam for discussion, it is essential to point out that there has been a group of scholars in the Islamic world which was basically opposed to the very idea of*'ilm al-kalam* and rational debate about Islamic doctrines, considering it a taboo and an innovation in the faith (bid'ah). They are known as "Ahl al- Hadith ." Ahmad ibn Hanbal, one of the imams of jurisprudence of the Ahl al- Sunnah , stands foremost among them.
The Hanbalis are totally against kalam, Mu'tazilite or Ash'arite, not to speak of the Shi'ite kalam. In fact they are basically opposed to logic and philosophy. Ibn Taymiyyah, who was one of the eminent scholars of the Sunni world, gave a verdict declaring kalam and logic as 'unlawful'.