Not at all dense to ask @AnneOfCleavage , and I totally agree and tell her not to be defensive, it is her right. It is more in Dublin, similar to what is happening here, the right wing division tactics, anti-immigrant sentiment, press stoking etc, but it's fuelled more in Ireland now due to the shortage of accommodation, cost of living and their being part of the EU that makes them take a higher share, or dealing with undocumented finding their way over via NI routes.
Over the 4 years it seemed to have gotten worse, there is a lot of resentment towards people not being, nor will ever will be 'Irish' through foreign birth registration back door routes (as they see it, not mine) or the living 5 years to apply. The latter is now being looked at to extend. The accommodation sites are particularly toxic for those students from non-Ireland applying for masters/PG/work where they are continuously being told to 'stay home, not welcome'. The irony of that line. FBR/Passport FB sites are even worse, the harbinger gatekeepers haunt applicants and never seem to get kicked off.
Strangely overall, DD faced more initial issues being english vs her being 'other' (it's not always easy to identify what mix she is) so she patiently gained acceptance as they got to know her, though this year after too many go home 'pki comments from randoms at music festivals, clubs and bars which she'd never encountered before, left her quite jaded.
That all sounds very gloomy and I really hope, not everyone's experience, and like most things, it's always a minority. And hopefully cyclical, as someone who grew up here in the late 60's/70's from India so it feels very deja vu!