Okay she wants to forgive Katherine good i am not talking about that what i am saying is she has been living in mystic falls all her life and yet lives in bubble . Who can forget her famous quote " nothing bad ever happens in mystic falls " . I agree at that time she was just a normal teenager whose biggest crisis was her boyfriend being too sweet .
But things have changed drastically for her after that and still she remains naive about the world she lives is really not acceptable . She have witnessed how a few drop of her blood was all that needed to create alaric gap an originals vampire . Her blood was used to create hybrids . Her blood was shed to break a curse. Even the Augustine vampire club took her blood for scientific purposes . So she have witnessed various incidents where her blood was used too create havoc in the world .
So even after being told stefan and elena are chosen because they are doppleganger . And even aftec r they took a buket full of blood . S
she is asking them if that is all they want , if so then can she go home so that she can forgive some one . Is . Does those travellers seems like they were on a vacation since they could not find anything else to do they decided let take some of elena blood since she is into donating blood more than once every week . Is she naive or stupid to not put together that some drastic thing might happen because of her latest donation .