This is fiftieth anniversary of the 1969 IRA split. Here is some footage and audio of Jimmy Steele’s speech in Mullingar in July that year, regarded as a key event in the split.
Both Steele’s speech and that of Jim O’Regan (the official speaker for the IRA on the day) are transcribed here. You can decide for yourself whether the content suggests the IRA split on left/right lines or not (I’m not convinced).
I’ve posted some audio from O’Regan’s speech here: