okay b4 i begin ask your self this why did tobi help itachi kill the uchihas ???wouldnt having a army of uchiha clan members alive benefit tobi ? ? now what did he gain from this action ??? itachi !!! call me crazy but i think tobi is not a uchiha.... it will explain how tobi didnt like danzo and danzo order the kill, so they are connected some how because tobi knew ........ my other theroy is tobi can control time and space just like kakashi does, and kakashi isnt full blood uchiha , maybe its affect when you arent true blooded ....... everyone with a ms has the same abilities but different look except kakashi and tobi there has to be something linking them ... idk what do u think ?