I'm not sure it's a question of 'believe' - we all know the writing has been on the wall for Rafael for a long time. Surely Digne could have sat tight for a week or two, perhaps even half a season if needs be, then move if Rafael was still here (it's not like his contract was running out).
I don't doubt Digne was happy until Jaffa alienated him, but I also don't buy the idea his heart was for EFC and no one else. He's a French professional footballer. If it had of worked out at Lille, or Roma or Barca, he wouldn't be here. I'm not criticizing him, just trying to see it for what it really is/was/might be.