Under that program, the FBI used information provided by the IRS to target a wide range of "subversive" individuals and groups under both Republican and Democratic administrations.
What's actually different about the current "scandal"...
What is also different is that some of those organization were trying to over throw the government through illegal means, some had backings of foreign powers unfriendly to the US (USSR, Cuba etc) or out right enemies (Vietnam, North Korea). There were a lot of other differences too such as Hoover essentially considering himself to be the embodiment of the law himself. Oh, wait, maybe there is not that much difference after all. It just moved up the chain a bit.