Are you looking at the manga with foggles on or just not willing to accept what the manga has written out clear as day? Ashura wanted peace through love, and Indra was just bitter he wasn't chosen as successor, in which why he initiated the war against Ashura. Hasirama and Naruto are the ONLY reincarnates to be shown thus far, and the fact that they both posses the same ideals, characteristics and outlook on life reflects exactly how Ashura was, considering his spirit dwelled in them. People can have different personalities and both fight for the same cause, why you mentioned that I don't know.