"As an actor, your job is to empathise with the character, not only empathise, but justify," Eisenberg told AFP in an interview to promote his widely acclaimed new movie " A Real Pain ".
"You kind of wonder like 'oh, so this person didn't evolve into a profile in courage'.
"How is it possible that all of us don't wake up every morning and kiss the ground that we're alive?
"Culkin was cast in the film despite not being Jewish, something Eisenberg said he was initially "hesitant" about.
"I was volunteering every day at this domestic violence shelter that was run by my mother-in-law.

'Social Network' star Jesse Eisenberg slams Mark Zuckerberg as 'obsessed with power'