In Fantastic Beasts and Where to Find Them, towards the end of the movie MACUSA see Jacob and tell everyone he needs to be obliviatedObliviated too. Then they leave and Jacob, Newt, Tina and Queenie are alone when they come out of the underground.
They were all friends (and evidently didn't want him to be obliviatedObliviated, as evidenced by their attempt to hide him a few minutes earlier) so why did they have to obliviateObliviate Jacob if the MACUSA had left?
Why couldn't they just disapparateDisapparate with him and keep being friends? Would MACUSA have check if he was really obliviatedObliviated or is there another reason why they went through with it?