Why Did Prophet Muhammad marry Ayesha a young girl

Is the Purpose Criticizing the Marriage of Young Girls or Distorting the Picture of Prophet Muhammad? Most of the Western people are astonished from the fact that the Prophet Peace be upon him married Aisha who was just nine years old while he was fifty. Some of them even called such marriage as rape and some of them condemned it. Not only this, but some of them portrayed the Prophet of Islam Peace be upon him as a man who is sexually suppressed and considered that as the real picture of Islam!! They have ignored the fact that such marriage in such age in such era was a natural matter, therefore it is clear that they are not criticizing the early marriage of a nine-year-old girl to a fifty-year-old man as much as they are keen to criticize and distort the picture of the Prophet of Islam Peace be upon him and instigate others against him. Accordingly, this undermines their credibility and unveils their false human feelings and malicious intentions under the pretext of defending the rights of woman. If they were really seeking denouncing such marriage, they should have spoken about such marriage as a general phenomenon which appeared before Islam and continued after it and would not focus their criticism on one person as if he was the one who invented such marriage or the first one who applied it or the only one who did it. Prophet Muhammad Peace be upon him was born in a society in which early marriage was something ordinary and natural, therefore, he married the way others did. Moreover, his enemies, who tried to kill him, did not use such marriage as a pretext to distort his picture or instigate against him because it was an ordinary matter in such era, and the