is one piece episode 702 filler?

In Spider Miles, as Donquixote Doflamingo sleeps, he dreams about his past. Hearing the voices of people talking about how they should kill the Donquixote Family because they are former World Nobles who the Marines will not save, Doflamingo begins to sweat and grind his teeth in agitation.

In the past, Doflamingo, Rosinante, and Homing were hung from the windows of their burning house by ropes around their arms. They were blindfolded by a mob of commoners who desired revenge for the suffering the Celestial Dragons had inflicted on them.