Yeah, the poster is an idiot, but to imply that the reason that Travellers get targeted is because they're Irish can mislead people. The Irish themselves target them in similar ways that Romani get targetted across Europe. And the Irish now do recognize them as their own ethnicity, though it was a long time coming.

A quote from a Fianna Fail councillor in 96 for reference:

The sooner the shotguns are at the ready and these travelling people are put out of our county the better…. They are not our people.