Uhm no...Madara probably could of owned Tobirama,the fact remains that everyone thought Madara had died at the vote fight,Even Hashirama himself believed this...oh lets just pop up out of the blues and achieve nothing by attacking Konoha and let my almighty plan that ive had for a while go to waste.
If he said Uchiha would be exterminated it means he could not stop him , nice find . But really lord tobirama solos totsuka blitz gg , oh wait that's Itachi nvm.