Nah, Ireland has been one of the major beneficiaries of the expanded EU. At first, subsidies from Brussels flew in, now they have benefitted from having the Euro as their currency (as opposed to the Brits who kept their pound). Granted their tax policy set them apart but it has allowed the little country to have one of the highest GDP’s in the EU.
The Irish won’t vote against it.
Don’t be surprised when they do vote against it...