I'm Irish. They provide 2000 jobs here in Dublin, and that has the potential to double even in the next few years.
The fact of them being here is a direct reason Facebook, LinkedIn, and a load of other companies are also here.
They're indirectly responsible for, I would guess, about 10,000 jobs.
I couldn't care less if they don't pay 12.5% corporation tax - they've provided massive social value even without it.