It is permissible to marry a child but it isn’t permissible to have sex with that child if she is not ready physically and emotionally.
The marriage of our Prophet to Aisha was by the instructions of Allah. It was revealed to him that he must marry her.
Aisha was proposed to before being married to the Prophet salla Allahu alaihi wa sallam.
She carried a lot of the teachings of Islam to us.
The disbelievers accused our Prophet salla Allahu alaihi wa sallam with being a sorcerer, a poet, a mad man and a priest. None of them had ever said anything about his marriage to Aisha, may Allah be pleased with her. No one has ever accused him of being a child molester.
When a person gives his daughter in marriage to someone, he is interested in her welfare. What can be better than marrying the best man ever to have walked the earth?
She was the love of our Prophet and he was the love of her life. Why would anyone say anything negative about such a legitimate thing?
With the existence of gay marriages and homosexuality and with the spread of crimes and violence, it is only strange why anyone would make an issue of something that took place in the past and all parties were happy and honored.
A person is either denying the authenticity of the hadeeth that states this marriage, and this person is a Muslim but must be taught and brought back to his senses. This is done by teaching him or her how Allah protected this great religion by the science of Hadeeth.
But if a person is condemning this marriage and accusing the Prophet salla Allahu alaihi wa sallam, in this case, this person is not Muslim anymore and must be warned of his actions