Complex sentence: According to Jannetty it was Curt Hennig who brought him back to the WWF, who was on good terms with Vince McMahon and convinced him that the bad performance at the Royal Rumble was indeed Shawn Michaels' fault.
Split into simpler sentences: According to Jannetty, it was Curt Henning who brought him back to the WWF. Henning, who was on good terms with Vince McMahon, convinced him that the bad performance at the Royal Rumble was indeed Shawn Michaels' fault.