R.E.N. Spells Ren
Veteran
I wouldn't be surprised either. I know Baelish was a naive 14 year old at the time but, I could see him inadvertently causing the entire Rebellion, then realizing how much damage he could cause by playing the shadows.
I just don't know how long after Brandon nearly killed LF did Rhaegar take Lyanna?
Littlefinger has noted that that experience changed his whole outlook....he accepted that he'd never win playing their game, but he didn't give up. I don't think it was inadvertent, I'm thinking he intentionally sought to have Brandon killed (the way he worded it to that whore was "he went and got himself killed" instead of the mad king murdered him cuz he's fukking crazy).