The deal was that if Sinn Fein/PIRA stopped bombing England then they would get seats in government.
The body language/language of Adams and McGuinness ever since is that of the pupil who is confident that the Head will not discipline him , because he is a snitch.
However, as time has moved on , the guns and the semtex are [mostly] gone. The war is over and Gerry and Martin are beginning to wonder if Perfidious Albion has done the dirty on them and that they are not going to be protected after all. Hence McGuinness’s comment after the arrest of Adams. It was a message to the Brits.
This society will never move on until those responsible for hundreds of deaths are prosecuted.