There is no way to question the faith with the muslims. If they ask you to speak to a sheikh to answer your questions he will require you to ask AND ACCEPT what he will give as answer.
It's just another chance to be fed another brick regardless of what logic and reason have to say in the matter.
Muhammed is a problem but he can't be blamed solely as he is a man who took a chance and gained a lot and has passed away 1400 year ago. The systems that are built to establish and nurture fundamental Islam are to blame and to have their feathers removed constantly until it is tamed -for humanity's sake.
Muslims usually say when confronted with Islam's disrespect to logic, they'd say "but we knew Allah by the mind!!" which is a fallacy they repeated so often that they ended up believing it as though it is a fact. Nothing in Islam is scientific whatsoever. Zilch!
It makes me laugh actually because there's nothing you can do mentally to know God... in fact, you have to silence the mind in order to do so.
They talk about logic ... Islam is illogical from it's birth in every aspect.
Humanity? ... hardly any... if you call saying assalamualikum is the peak of civilization and humanity then it's a disgrace.
Science? .. Camel Piss and the rulings of women's monthly periods ... yeah they went scientific as much as scientific as a pair of grannies arguing about the late buses (!??)
Social development?..... yeah multiple gathering five times or more a day for brain washing and the law of "wala'a and bara'a" (like muslims only and hate all kaffir)
Where was my mind ALL these years??? my apologies to the universe for this short return of investment