It was for the greater good! Why could nobody understand that? Did they think that he wanted to go out and murder loads of people, start a rampage and allow terror to sweep into everyone's hearts for the fun of it? No! It was for the greater good!
And now, because of the fool that was Albus Dumbledore - curse him for ever having a friendship! - he was locked securely in Azkaban, not even the Elder wand to his name anymore.
Nobody would talk to him and he never received visitors. How could he make people understand why he did what he did? If they knew why, then surely he'd be released so he could carry on.
He couldn't believe that he'd be betrayed by his friend like this! It wasn't his fault that the moronic wizard had killed his sister and it definitely wasn't his fault that the idiot thought himself in love with him. He'd never indicated that he felt more for him than just a simple friend.
But, despite all of this, Gellert knew that he'd never give up the location of the Elder wand when the next dark wizard came calling. For he knew that it would happen. The greed for power was just too tempting.
If he couldn't have the wand then neither could they. It was clearly safer with Albus.
Chocolate Frog Card: Gellert Grindelwald (gold) - Write about Gellert Grindelwald
Gringotts Prompt Bank: Azkaban (HP location)