Muhammad is the last prophet.
arguments?
"Muhammad is not the father of [any] one of your men, but [he is] the Messenger of Allah and last of the prophets. And ever is Allah , of all things, Knowing." (Qur'an 33:40)
1. what are the reasons that make you accept Muhammad and reject White, rather than the other way? do you have any?
Consider all the arguments that Muslims usually give to Christians, in order to make them accept Muhammad, and apply them to the case of Ellen White.
2. By the way, your "ijtihad" is very unclear. See also: "And for every Ummah (a community or a nation), there is a Messenger; when their Messenger comes, the matter will be judged between them with justice, and they will not be wronged. (Qur'ân 10:47)"
1. Muhammad wasn't just a mere man, he was a descendant of Abraham.
2. He preached the monotheism, the belief in One God.
3. «During the 23-year period of his prophethood, he changed the entire Arabian Peninsula from paganism to worship of the one true God, from tribal warfare to national unity, from anarchy to disciplined living, from barbarism to the highest standard of moral excellence. At the time of his death most inhabitants of Arabia and the southern regions of Iraq and Palestine had voluntarily embraced Islam. To posterity he left a creed of pure monotheism that included comprehensive legislation based on a balanced system of moral values.» (Clear your doubts about Islam, Sahih International)
4. After the start of his Prophethood, a lot of people started believing in One God and stopped worshipping idols.