Who uses the term 'for the greater good' when he does something bad?

Both Grindelwald and Dumbledore used the phrase. It was even carved over the entrance to Nurmengard, the prison Grindelwald built for his enemies and where Dumbledore put him after the famous duel if 1945. Dumbledore stopped using the phrase after their falling-out, while Grindelwald continued its use.

RON WEASLY

isn't it Grindelwald ? i think so ...

Grindelwald (and Dumbledore, back when the two were working together).

I have the same answer as Moonshoesperry. But are u actually asking? Cuz it seems like u already know so shouldnt this be in the kwis section?

Ye, Grinderwald... funny thing actually. I was just reading about him on wiki yesterday cause I noticed the actor who portrays him in the deathly hallows was Jamie Cambell Bower. Who'll also be playing Jace in the movie adaptation of TMI series door Cassandra Claire =D

IT'S GRINDELWALD!!!!!