There's a lot of "mischief" going on around Brexit and the EU more widely Pat.
Here in the UK for example we have lifelong anti-EU politicians seemingly wanting to anchor the good ship UK as close to the EU harbour as they can. Corbyn and McDonnell's position can only be for purely political gain.
I don't follow Irish politics, but it seems to me we have similar goings on in Ireland.
“The economic and fiscal policies of the European Union have had catastrophic effects on the lives of many of its citizens. At the core of these policies are the Fiscal Compact, the economic governance, the Banking Union and the European Semester.
“The gap between the rich and poor in the EU is constantly increasing, social rights are being dismantled, unemployment (especially youth unemployment) remains at high levels and the people of the member states are being subordinated to poverty and stagnation.
“Democracy must be strengthened through an increased role for the national parliaments and the European Parliament, also through greater accountability, transparency and supervision of European policies.”
Sinn Féin MEP Liadh Ní Riada
You can find plenty of anti-EU stuff from prominent Irish politicians up until the UK voted to leave the EU and then all of a sudden they seem to have withered away, whether that's because Republicans see a chance to stick the boot in to the UK, or that Irish politicians know they'll need some EU support and goodwill to deal with the effects of Brexit.