Yea PB from what I can tell Frank Sr. pushed Jr. and Kurt into the life, it seems he had them collecting for him before they even graduated high school. Then Kurt didn't even testify against him but yet he had to deal with fake bombs on his steps that he thinks came from his own old man just lets you know how sick he was.

Even still Kurt showed up to court to let Frank Sr. know at sentencing how bad of a Dad he was and to get his shots in as well. So it does make you wonder how 2 of your sons turn on you like that you must have really done some bad shit to them.