Saint Patricks Shamrock which had only 3 leaves was also a metaphor for Ireland this being three provinces, Munster, Leinster and Connaught.
The Snakes were the protestants whom he banished, not from the Island totally, but across the border into Ulster (6 Counties).
Any effort to re Patriate Northern Ireland into the 26 Counties of the Republic, will in fact be going against St Patricks wishes for purity as he saw them as venomous.
This is the true story of Ireland and when you wear your Shamrock with its three leaves on March 17th, think of what it would be like if we are to bring back the w(asp's)