What is the basic difference between shia's and sunnis?

LOL.

This is what I don’t understand. So after decades of spreading Islam, you believe the Prophet (saw) would just leave the fate of the ummah in the hands of destiny. That he did not appoint anyone to be captain of the ship of Islam. What you are implying here is that Abu Bakr and Umar were better ‘statesmen’ than the Prophet (saw). You’re charging the Prophet (saw) with ‘dereliction of duty’, Abu Bakr was qualified to appoint his successor as Umar, yet the Prophet (saw) was not? If the Prophet (saw) did not guide the people in terms of government, then how do we believe that he is the perfect model for mankind? I don’t believe he would make provisions to keep the future people of Islam to stay blind.

If the Prophet (saw) did not appoint any successor, wouldn’t you have expected some sort of government or procedure of leadership, or any sort of instructions given by the Prophet?