I would say you should ask, but it is answered already in the article. MSW quotes from Spadaro to the effect that fundamentalists operate out of fear, especially a fear of disorder. This creates an image of God that is opposite to the God of mercy; they choose a God who is head of a political faction vying with other politicians for power, instead of God who is already all powerful.
This is more complicated than it seems, because the fundamentalists often think of themselves as a political faction and interpret everything through that lens. If they are challenged to be merciful, they take it as being opposed and retreat into their bunker instead of religuishing their fear.