How can Mccain justify his relationship with Liddy, while criticizing Obama and Ayers?

McCain also was a close ociate of Charles Keating, the corrupt banker who cost investors and taxpayers billions following the 1987 Savings & Loan Debacle. Keating contributed heavily to McCain, and McCain reciprocated by doing whatever he could to protected Keating while he stole from depositors. McCain was one of the Keating Five.