Why did the children of Israel differ among themselves after the true knowledge in the form of the Torah and other scriptures had come to them from God?

 

 

Verse 14 of Chapter 42:
The people became divided only after the Knowledge had come to them just because they wanted to wrong one another. Had your Lord not already issued the Word to defer their punishment till an appointed time, the matter would surely have been settled between them. And the fact is that those who were made to inherit the Book after them, are involved in a disquieting doubt concerning it.

Verses 16-17 of Chapter 45:
And certainly We gave the Book and the wisdom and the prophecy to the children of Israel, and We gave them of the goodly things, and We made them excel the nations. And We gave them clear arguments in the affair, but they did not differ until after knowledge had come to them out of envy among themselves; surely your -Lord will judge between them on the day of resurrection concerning that wherein they differed.