(from the authentic hadiths of Muslim (8:3309) / Bukhari 58:234 )
As Muhammad is considered by Muslims (including the millions upon millions who are immigrating to the West) as the "perfect man" whose example is to be emulated for all time, child marriage is thus a sacrosanct part of all four schools of Sharia.
Please review this video of Dr. Ahmad Al-Mub'i, a Saudi marriage officiate who declared that a girl can be married at the age of one if sex is postponed. In an interview aired on LBC TV in June, he advised following the example set by the Prophet Mohammed, who married a six year old girl Aisha and had sex with her when she reached the age of nine.
This is, far from being an "extremist" interpretation of Islam is not only widespread but pervasive not only in the Islamic world:
Muslim girl attempted suicide at 11 because of pedophilia.
Women's Rights in Islam: Divorced at 10
Women's Rights in Islam: Sex with Infant Girls
Child brides in New Zealand
Canada: Muslim child brides on rise
Canada: Immigration: 'Child bride' loophole can't be closed
Muslim Child Brides in Britain
Now under pressure from Western Governments (who turn a blind eye to this Most Islamic of practices) because of a recent incident that brought this to the attention the the slumbering West:
12-Year-Old Girl Dies While Giving Birth In Yemen
As a result, which was reported in CNN, the Huffington Post , and the Straights Times among an assorted number of other news outlets:
"...THOUSANDS of Yemeni women, their faces covered in religious veils, demonstrated outside the parliament on Sunday to oppose proposed legislation banning the marriage of girls under 17.
The protesters held up banners proclaiming 'don't ban what Allah made permissible,' or 'stop violating Islamic sharia law in the name of rights and freedoms,' an AFP correspondent said. Answering calls by Muslim clerics who oppose the proposal on grounds it goes against Islamic sharia law..."
Or, see the video of the demonstration here (with subtitles):
This is Islam.