Board Thread:Naruto Discussions/@comment-2245550-20160501144337/@comment-734582-20160503105950

It would be very difficult for Itachi to prove Madara's existence considering the guy had been moving in and out of konoha at will for some time now.

Furthermore, Madara's existence would be all the proof the village needed that the Uchiha are untrustworthy, that they were right to suspect an Uchiha in the first place and that they simply cannot be put into a position of power.