[Zamiel_Snawley]

Exacerbated witch hunting, for one[1]. Enabled the Protestant reformation which led to the 30 years war, among others[2].

[1] https://blogs.ubc.ca/etec540sept09/2009/10/31/unintended-con...

[2] https://en.m.wikipedia.org/wiki/Thirty_Years%27_War