There is a recent paper by Robert Warren Anderson, Noel D. Johnson, and Mark Koyama, and the abstract is this:
What factors caused the persecution of minorities in medieval and early modern Europe? We build a model that predicts that minority communities were more likely to be expropriated in the wake of negative income shocks. Using panel data consisting of 1,366 city-level persecutions of Jews from 936 European cities between 1100 and 1800, we test whether persecutions were more likely in colder growing seasons. A one standard deviation decrease in average growing season temperature increased the probability of a persecution between one-half and one percentage points (relative to a baseline probability of two percent). This eﬀect was strongest in regions with poor soil quality or located within weak states. We argue that long-run decline in violence against Jews between 1500 and 1800 is partly attributable to increases in ﬁscal and legal capacity across many European states.
In the Matt-Ezra debate over whether too hot or too cold is worse, this Irishman has to side against the blustery winter.