No politician that I can remember has ever held a press conference on St Stephen's Green (I'll be happy to stand corrected if anyone can think of a previous instance). It's a place for interviews. Press conferences are held indoors. Virtually always.
So it is seems to me pretty darned obvious that Nick Griffin (who has been followed by UAF protesters at every press meet he's had during the Euro election campaign) planned an unusual open press conference on St Stephens Green specifically because he wanted to be interrupted by UAF protesters so it would make the news.
These UAF people were born yesterday it seems.
Stop giving this fat half-wit publicity!