Thing is, what happened is a whole lot of nothing. The IRS decided to single out a group of likely tax cheats for extra scrutiny. The method they used was arguable unconstitutional. Hardly an impeachable offense, since it is not a crime. That is not even a scandal.
Clinton should have been impeached for bombing Yugoslavia, but not for having sex with Lewinsky. Obama should be impeached for the Utah Data Facility but not for this.
I'm the first one to argue that the method the IRS used was unconstitutional but I would never dream of impugning their motives without hard evidence like you are doing.
Some called it Walpin-Gate. Back then.....as Obama's only reason was he had lost confidence into Walpin. The NY Times would eventually cover it. Even tho they didn't want to in the beginning.