An excellent analogy, only multiply the force and danger by 1000. Sein Fein represented a geographically and ideologically limited conflict in part of Ireland. Islam is an ideological powerhouse around the world - and Obama wants to make CAIR the official US spokesmen and powerbroker for Islam in the USA (and if you look at US foreign policy, arguably elsewhere too). People like the Kennedys or Chris Dodd had connections with Sinn Fein, but Sinn Fein NEVER had the deep, direct and immediate backing of the US Government, particularly DOJ and DHS, that Obama has given to CAIR. This level of promotion became clear to me upon seeing the amazing national-stage press-conference CAIR gave on December 2 - only hours after this national emergency took place.
We didn’t send US grunts to war for the interests of Sinn Fein.
Can’t say that for the Saudis and MB’s.