If anything this is done deliberately by Clooney and his friends from the Senate to put public attn and pressure on the issue. If they were politically smart they wouldn't have arrested him. Now they'll face unprecedented pressure to respond in regards to Sudan.
Unfortunately, it's not the west's national interest to do anything about Sudan. The west doesn't really care about humanitarian concerns. It's all about "whats in it for me". If there's benefits to be made out of, they'll intervene whether it's morally right, or like most of the times, wrong.
As in Western Gov'ts. The only reason they'd contribute to humanitarian concern is if they get plenty of positive publiciticy and profit from it, or get positive publicity out of it for very little cost.
Messing with Sudan or Syria which is expensive and not profitable does not fit the west's national interest.