Accordingly...
Accordingly, Allah -azwj , although in clear Knowledge of their actual commitments, who were under the tree, only Praised those who were sincere in their pledge but without specifically excluding the insincere ones \u2013 the exposure of their hypocrisy was left for a later time when their actions would lead them to their separation from the praised worthy believers.
\n After passing away of Rasool-Allah -saww , the differing of Muslims started and reached to the point where some of those who pledged allegiance under the tree, were fighting against each other, thereby, were responsible for the killings of thousands of Muslims in the battle fields (i.e., Jamal, Siffeen).
\n Some Sunni Muslims, may, try to justify the differing of the \u2018Muslims under the tree\u2019, by quoting a Hadith, in which allegedly Rasool-Allah -saww said: \u2018 Difference of opinion among my Ummah (Nation) is a mercy \u2019, but it is against the Words of Allah -azwj in the Holy Quran where Allah -azwj Says: \u201cAnd mankind was not but one community (united in religion), but (then) they differed.
\u2026\u201d [Yunus 10: 19] and there are many other Verses Forbidding the differing (e.g., 6:159, 3:103).