You know...thinking further about it....
Arthur has a great deal of control right now......we could argue about his intentions even get violent and hurt one another trying to prove we are right and know his intentions....all the while he is sitting back watching waiting until a time of his choosing to stop it.
We could even start a whole bunch of religons to see how many people believe we know Arthur's intentions and reasons.
We can even have wars about it..making others admit we know Arthur's reasons and intentions "or else".
the possibilities are endless...and we can have fun doing so I suppose.....but Arthur can end that too if he chooses.
He doesn't have to lie....all he has to do is stay silent. until a time of his choosing.
when Arthur decides to speak....some are going to love him and some are going to hate him...
But EVERYONE is going to listen to him.