Colm O'Regan: Horrible Histories is grand, but what about our own horrible history?

Terry Deary's Horrible Histories: a visiting theatrical production doesn't necessarily localise well, says Colm O'Regan
Booing Queen Elizabeth the first is always a good idea to get an Irish crowd going. But it feels hollow. We’re being asked to boo her for other bad things. But there’s not a mention about Ireland.
The actors carry on oblivious, but I know I’m not the only one thinking WHAT ABOUT THE PLANTATIONS?