smh all hashirama meant by that was that he thought sasuke was a pure child at heart and wasn't driven by hatred and vengeance but little does hashirama knows sasuke is driven by hatred and has done things that are not considered pure thats all he meant
This is not a reason...if you said that the presence of six zetsus inside him had given him some senju dna then perhaps it would have been a possibility...but in this case 'pure' means purity in heart....sasuke has lost that due to his desire for vengeance....I
And where is your prove that Sasuke has Senju DNA? I guess you don't have one..i love how you said people shouldn't say "he killed people or he's evil.