I've got few questions, . I'm just deeply disturbed by the fact that in Islam a man can marry his adopted daughters as stated in Surat nisa. While I understand that they aren't biologically related,, but what if they were adopted when they were babies? . I'm also wondering is regarding your Tariq Ramadan's book review you wrote , on "in the footsteps of the prophet" I'm quite surprised you didn't mention about Aisha's age, that the prophet saw it in a dream twice. Do you agree with him?
I answered your question on adoption on its own page here: Why does Islam allow a man to marry his adopted daughter?
Regarding Aisha’s age, I had already dealt with it in a previous answer, so I did not repeat it there. Many liberal Muslims have often used weak and unconvincing arguments to support her being older than 9. Thankfully it appears that we are in a better position now. Please see this article: Did the Prophet marry a 9-year-old girl? (She may have actually been close to 18) As I mention in that answer, Dr. Salah al-Din al-Idlibi, a respected and traditionalist hadith expert, examines the evidence, including new evidence not examined by others, and finds that there is strong support for her having been born 4 years before the Revelation, which makes her close to 18 at the time of the consummation of her marriage to the Prophet 
in 622 CE.
Regarding seeing her in dreams, it is mentioned at least in al-Bukhari. Since it was common for prophets to receive commands in their dreams, I see no strong reason to doubt this. If she was approaching 15 at the time of the dreams, then that wouldn’t be so strange as her being 6 at the time.