This guy asked if he's in the wrong for a decade-old family mistake that his BIL just can't put behind him. He's crazy for even asking that! As the OP shared to r/AmItheA******, there was an incident that took place about a decade prior, but which has rippled out into the current day, since his brother in law will not forgive and forget the situation. The OP wrote that the BIL is a construction worker, and while he was away, the OP and his father borrowed some pricey equipment . Like, thousands…