evidence: The second leading party on the unionist side was the DUP, formed in the 1970s. Led by the fiery Presbyterian minister, Reverend Ian Paisley, the DUP was even more rigid in rejecting any accommodation with either the nationalists in Northern Ireland (especially through power sharing) or with the Irish government in the South. The DUP largely boycotted the peace negotiations, in part because it insisted on a complete and credible renunciation of violence and prior decommissioning before sitting down with any of the parties linked to paramilitaries (republican or loyalist). Ironically, following the Agreement, the longest period of stable devolved government in Northern Ireland came during a time when the DUP shared power with Sinn Fein (2010–17).41 [...] But political scandal in 2017 led to institutional paralysis, which remains unresolved.80 Inter-communal mistrust remains high, and volatile issues including language, parades, and symbols continue to be flash points. Despite intensive discussions since the Agreement was signed, there is still no agreed mechanism to address historical legacy issues. Brexit further complicates the prospects for the future. The DUP supported Brexit while a modest overall majority — 56 percent — opposed it. Sinn Fein has called Brexit "the most serious threat in the history of the peace process."81