As I mentioned before: To have faith is one thing, but to have a blind faith is another matter!!!
My dear brother OneGod, I am not using double standards regarding the prophets. Muhammad only plagiarized and hi-jacked the teachings of the OT and of Jesus Christ to start a new cult. The same thing Joseph Smith did with Mormonism, and David Koresh with the Branch Davidians. I understand your sightless belief in Allah’s Apostle, but why did he have to marry Zainab as soon as the three months period after her divorce ended? Why did he marry her at all? Didn’t he have many other women? And please, do not cite Solomon again! Because Solomon never proclaimed to be the last prophet, and that his religion is for all people and all ages.
Also, if you could cite the hadith that states Muhammad gave Zainab to Zaid for marriage? Analyzing this story, women look like property that is traded around, like stocks on WS.
Regarding Adoption, let me state this:
“Adoption of orphan/helpless child was a very popular and moral practice amongst pre-Islamic Arabs. By adopting orphan/helpless child, they used to consider adopted child as their own. And they used to pass onto them the adopter's genealogy and name, his investment of them with all the rights of the legitimate son including that of inheritance and the prohibition of marriage on grounds of consanguinity. So the Adoption of Orphans is not a Western new tradition. People adopted orphans and other children for many ages before Allah’s Apostle. Another example is the adoption of Jesus by his foster father Saint Joseph.”
However, The all-wise legislator of Islam willed to undo the above mentioned Arab practice of adopting children. The divine legislator willed to give the adopted son only the right of a client and co-religionist. For that reason a verse was revealed: "God did not make your adopted son as your own sons. To declare them so is your empty claim. God's word is righteous and constitutes true guidance. (Q.33: 4)." It follows from this revelation that the adopter may marry the ex-wife of his adopted son and vice-versa. Thus Muhammad married Zainab in order to provide a good example of what the All-wise legislator was seeking to establish by way of rights and privileges for adoption. In this regard God further said: "After a term of married life with her husband, We permitted you to marry her so that it may hence be legitimate and morally blameless for a believer to marry the wife of his adopted son provided that wife has already been divorced. That is God's commandment which must be fulfilled (Q.33: 37)." Who, among the Arabs, could implement this noble legislation and thereby openly repudiate the ancient traditions? The truth is, however, that Muhammad was the exemplar of obedience to God; his life was the implementation of that which he was entrusted to convey to mankind. His life constitutes the highest ideal, the perfect example, and the concrete instance of his Lord's command (M.H. Haykal, page-296-297).
Those who are Muslims and are obedient to the Quran will not have adopted sons. On this, you and I OneGod, we don’t differ at all.