somethings been bugging me since the first time naruto and co met tobi.

if im correct yamato has been their in both encounters and tobi who claims to be madara still hasnt looked at him let alone show his hatred for mokuton users which he originally had. now im startin to more and more think this isnt madara.
you people think about it, with his speed he could easily have got to yamato but he hasnt even looked at him or even commented the fact he uses wood jutsu...hahaha tobi is a fraud