Interesting question but I do not know enough about the conflict to give informed reply. But personal interaction with the Irish people so far was positive experience.
Catholicism isn't relevant enough anymore to be seriously a source of any of that.. It lost major relevancy in XIX century, after having lost it in XVI century aswell. Much weaker force.
Bolshevicks could create "phobic" or fearful feelings if your country was under a proxy war with USSR yes. Could be interpreted as a Soviet informer of your troop movements. In Salazar Portugal you could be sent to Torture Chamber if you were openly a sympathizer with USSR. Because there was a Warfront going on where the Insurgents were supplied and trained by USSR and KGB.