The linking of the DUP to terrorist groups is a bit unnerving. Simply because it has only a constructed truth.
I've had a long conversation with a Belfast friend about this. They are not a loyalist Sinn Fein. Apart from a brief flirtation with Ulster Resistance in the mid-80s, and Peter...
Two words:
Peter Robinson. Your search is over.
Here's the Wiki entry (Obviously cross reference) https://en.wikipedia.org/wiki/Peter_Robinson_(Northern_Ireland_politician)
If you are gay be warned. You may not like some of his views...
All this said, a union with groups who now denounce...