Muslims: Why is there no mention of your prophet until 690 AD?

why do people pretend to have questions in order to make long, dumbass statements? You could have saved yourself a lot cut and paste by accepting the fact that Islam cherry picks the past of the hebrew religion (which borrowed from earlier Sumerian and Canaanite religions) to suit it's needs much in the way that Christianity, a relatively young religion, cherry picked Judaism to suit its needs.