The heave against Arlene Foster was not just about dissatisfaction with her lack of leadership, though that was a large part of it because personality is always a large part of politics. The defenestration of Foster is a DUP grass roots revolt against the Good Friday Agreement (which the party never supported) power-sharing, the Irish Sea border and social liberalism, such as same-sex marriage, voting against gay ‘conversion therapy’, and imposition of abortion legislation: a pretty comprehensive list of grievances.