From Slate, in an article, "Gerry's Kids: The IRA and Sinn Fein are in trouble. So where does Gerry Adams go from here?":
If Adams really approved the bank raid, it's hard not to ask: What was he thinking? One fascinating theory says the bank robbery might actually be part of Adams' covert strategy to force a recalcitrant IRA to lay down its weapons once and for all. Ed Moloney, an award-winning journalist and author of A Secret History of the IRA, says Adams may have sanctioned the robbery knowing the ensuing outrage would force the hand of the hard-liners in his midst, leaving them with a stark choice: Either go back to war, a political non-starter in the post-9/11 world, or, if republicans are to preserve the credibility they have gained both on the island and in London and Washington, lay down their arms for good. In other words, republicans can run a major political party, or they can be ostracized and lumped in with Osama Bin Laden.
Perhaps I'm a bit prejediced to see this as good news because I've written (in The Irish Rover) that he, unlike the Islam-facists, is someone with whom we can negotiate--limited aims and all that, but he's just so damn cheeky.