As regarding their determination to cancel the campaign...
As regarding their determination to cancel the campaign, and their pressuring al-Siddiq to do so, in spite of seeing how much emphasis the Prophet had placed on its dispatch, his concern about expediting its departure, as well as his repeated statements to this effect, is but their own caution about the capital of Islam else it should be assaulted by the polytheists around it once vacated from a protecting force, while the army was far away from it, especially since hypocrisy surfaced as soon as the Prophet (pbuh) died, and the hopes of the Jews and Christians were revived, and a group among the Arabs renegated, while other groups refused to pay zakat .
The companions of the Prophet, therefore, spoke to our master al-Siddiq and requested him to forbid Usamah from leaving, but he refused and said: "It is better for me that birds snatch my flesh away rather than start my rule by overruling the command of the Messenger of Allah (pbuh)." This is what our fellows have said regarding al-Siddiq.
As regarding others, they are not to be blamed for trying to stop the campaign since their objective was nothing other than a genuine concern about the safety of the religion of Islam.
As regarding the question why Abu Bakr, ‘Umar, and others who were drafted in the regiment, lagged behind when Usamah proceeded, it was only to lay the firm foundations of the Islamic government, support the law of Muhammad (pbuh), and protect the caliphate, which was the only protector of both faith and the faithful. II No Hadith Curses its Draft Dodgers. As regarding what you have quoted of Shahristani's book Al-Milal wal Nihal , we have found it to be narrated without the name of its narrator.
Both al-Halabi and Sayyid al-Dahlani, in their respective books of traditions, have said that in fact there was no such hadith at all in that meaning. If you, may Allah protect you, are able to narrate hadith from Sunnis supporting it, then lead me to it, Wassalam. Sincerely, S Previous…