Fine Gael has gone from party of law and order to Keystone Cops
The ability of political parties to act completely against their own self interest never ceases to amaze.
The examples from history are too numerous to list, but a few relatively recent ones spring to mind: Fianna Fáil in the final months of Brian Cowen's government; the Tories after losing power to Tony Blair in 1997; the British Labour Party choosing, in Jeremy Corbyn, a leader who is completely unelectable; and the US Republican Party's decision to play with fire in the shape of Donald Trump.
It's too early to add the current succession process in Fine Gael to that list. But if senior party figures keep going the way they are, it'll only be a matter of time.