I don't see the issue with the supposed "white washing" yes Christian Bale doesn't look like our preconceived notions of what someone from that time looks like, but surely this should be a case of best man for the job, whatever you think of Bale, he got through the casting process was obviously what the production want.
Best person for the job, pretty sure that's what true equality is about. Not to mention the difficulties in securing funding, because lets be honest, how many Arabic actors have the cultural caché that would be required to secure funding for a project like this? It's a reality of the business, is it a reality that sucks? Abso-fucking-lutely it is. This isn't an issue of Scott's casting being on the nose of a hot button issue, instead of demonising him, perhaps we should turn our attentions to the studios that created that atmosphere or y'know... maybe actually turn up to movies with relatively unknown Arabic actors to show the movie industry we are interested in seeing movies starring them.
Do these considerations stop this being a bad movie? Not in the least. But it's perhaps food for thought and enough to make you turn your ire not against the Director or Actors, but against the studios that promote this behaviour with the way they award funding.
*PS. I'm not sure if Arabic would be the politically correct term here, but it would seem to be. If I'm wrong feel free to let me know (preferably without calling me a racist).