That was republican sinn fein id say.Your sure it was Easter Monday? I would'nt dare try to give you a history lesson here but the two organisations have very different politics.
The mainsream
SF ( for want of a better term ) had a commemoration in Port on Sunday with Aidan Mullins speaking. The two organisations are very different.
Basically Sinn Fein do not support Republican Sinn Feins attempts to achieve a united Ireland by violent means.
Republican
SF are also very critical of
SF sharing power with unionists and are completely opposed to the good friday agreement.
Not sure if that is what you were asking for. Im no authority but what exactly do you want the
SF stance on?