Salam alykum
First, I do not care about the opinion of Non-Muslims about Prophet Muhammad (peace be upon him). Whatever opinion they may have of Prophet (peace be upon him) will be negative since it is a clear threat to their way of life. Second, I do not have problem with any of the Prophet (peace be upon him) marriages he is allowed to marry whom he (peace be upon him) wishes or desires. As for Aisha R.A. being 9 years of age when the Prophet (peace be upon him) married her. I do not see any problem with this either, Prophet Muhammad (peace be upon him) scarified way too much for me to question him. Who am I to question the Prophet (peace be upon him) judgment? If he wished to marry 200 women I still would see no problem in his divine decision. His (peace be upon him) message is clear "There is no God But Allah and Muhammad is his slave and servant" How can people who claim that a man told them he is "Son of God" and brought the truth challenge a man who gave up everything and said he is slave of One true God. There is no religion that can have such greatness as Islam. The reason negative views bother us is not because of the views themselves rather over Eman. We should gain more knowledge and increase our awareness of the Deen. Only an ignorant person would bark back at a dog, an intelligent person would realize there is no point in barking back at the dog. The animal has no common sense to understand the reality. Similarly, people who do not see the message of Islam to be the truth even though the message is clear then it is pointless for us to respond back to them. These people have lost their intellect they can no longer think for themselves, responding to them is like responding to a dog. Study the Seerah of our Prophet Muhammad (peace be upon him) everyone will realize the truth and everything will fall in place. I highly recommend The Sealed Nectar.
In no way is this intended for the sister that posted the question. This is only refereeing to Muslims as mentioned trying to deceive the people and lie about our Deen.
Sounds like you are brainwashed!
Surely Mohammad's life and behaviour should be beyond reproach!
It is recorded that Aisha was still playing with dolls when she was married!
And how does comparisons with the customs of Arab non muslims at the time and the kuffar at any time in history come in to it?
Surely, whatever Mohammad did, had to be sanctioned by allah!
Therefore, does allah sanction child marriage today?