I already know what my friend OneGod might write about this issue , ao please allow me to post what Muslim Apologetics say about this fascinating epic in Allah's Apostle life.
Muslim Apologetics speak about a "glorious deed" of Muhammad, which the orientalists and missionaries have turned into a romance. He says, "As to Zainab Bint Jahsh, who has been wrapped up by orientalists and missionaries in an imaginary picture of romance and infatuation, true history judges that [Muhammad's act with] her was one of the glorious deeds of Muhammad. Being the perfect example of faith, he applied to her the Hadith that says, 'Man's faith is not made perfect till he loves for his brother what he loves for himself'.
Apologists conclude that it is one of the truly great facets of Muhammad's personality. It proves beyond question that Muhammad was the perfect exemplar of his own legislation, especially of such laws as were intended to replace the tradition and customs of pre-Islamic Arabia. He was the exemplar of the new system that God revealed through him as a mercy and guidance to mankind.
On the other hand, Arab custom and tradition demanded that the adopted son inherit from his adopted father, like the latter's legitimate children. And since this custom too was the object of Muhammad's attack, his choice of Zayd as the spear point of the first reform, would actually make of him -- if he were prepared to give up the inheritance to which Arabian custom gave him title -- the spearhead of another Islamic legislation prohibiting inheritance to any but the blood heirs and relatives of the deceased. This indeed furnished the revelation: "No believer, whether man or woman, has the freedom to choose otherwise than as God and His Prophet have resolved in any given case. To do so is to disobey God and His Prophet, to err and fall into manifest misguidance (Q.33: 37)”
The sad thing is, that all these examplar deeds and morals given by the Prophet, seem to always hurt others, and not the Prophet or his family. What an example for humanity.