I think political "losers" (Democrats when a Republican is in office and the reverse) and social "losers" (the disenfranchised, unsuccessful, fringe) are maybe

I think political "losers" (Democrats when a Republican is in office and the reverse) and social "losers" (the disenfranchised, unsuccessful, fringe) are maybe not being separated enough in the title, which seems to be more about the former and less about what underlying conditions make one person more predisposed to believing in conspiracies. The paper briefly touches on the latter, but is more about the former, and uses the term "electoral losers" which is more accurate but less exciting. Essentially when your guy is in office, the people shouting foul player are conspiracy nutsos, but when their guy is in office they're truth seeking concerned citizens. Also worth noting the article is from 2017, and the survey used from before and after the 2012 election. It would be interesting to see if such beliefs have increased since then.