To muslims: What's a proof that mohammed was a prophet?

Im not here to troll but...it's mentioned that he killed, d, married a 9 year old (seriously who does that), no miracles in islam (even these days). Ive seen videos of St Mary appearing to people and on churches but i have never seen mohammed appear on a mosque. Jesus did miracles, but why didnt mohammed? so, wat makes mohammed a prophet and what makes him a man of God? And now, the 9/11 and bombing is caused by the muslims and in egypt, on christmas day, 6 christians were killed after they left church, killed by muslims. Muslims prosecute every religion, what makes mohammed the right man to follow? Again, im not here to insult either religion i just wanna know