ations ▁for ▁extrem ism ▁is ▁one ▁that ▁views ▁it ▁as ▁a ▁pl ague . ▁Ar no ▁Gru en ▁said , ▁" The ▁lack ▁of ▁identity ▁associated ▁with ▁extrem ists ▁is ▁the ▁result ▁of ▁self - dest ruct ive ▁self - hat red ▁that ▁leads ▁to ▁feelings ▁of ▁reven ge ▁toward ▁life ▁itself , ▁and ▁a ▁comp ulsion ▁to ▁kill ▁one ' s ▁own ▁hum ann ess ." ▁Ext rem ism ▁is ▁seen ▁as ▁not ▁a ▁t actic , ▁nor ▁an ▁ide ology , ▁but ▁as ▁a ▁path ological ▁ill ness ▁which ▁fe eds ▁on ▁the ▁destruction ▁of ▁life . ▁Dr . ▁Kath le en ▁Taylor ▁bel ieves ▁religious ▁fundamental ism ▁is ▁a ▁mental ▁ill ness ▁and ▁that ▁is ▁" cur able ." ▁ ▁Another ▁view ▁is ▁that ▁extrem ism ▁is ▁an ▁emot ional ▁out let ▁for ▁severe ▁feelings ▁stem ming ▁from ▁" pers istent ▁experiences ▁of ▁opp ression , ▁in security , ▁hum ili ation , ▁res ent ment , ▁loss , ▁and ▁ra ge " ▁which ▁are ▁pres umed ▁to ▁" le ad ▁individuals ▁and ▁groups ▁to ▁adopt ▁conflict ▁eng agement ▁strateg ies ▁which ▁" fit " ▁or ▁feel ▁consistent ▁with ▁these ▁experiences ". ▁ ▁Ext rem ism ▁is ▁seen ▁by ▁other ▁research ers ▁as ▁a ▁" r ational ▁strategy ▁in ▁a ▁game ▁over ▁power ", ▁as ▁described ▁in ▁the ▁works ▁of ▁Eli ▁B erman . ▁ ▁In ▁a ▁ 2 0 1 8 ▁study ▁at ▁University ▁College ▁London , ▁scient ists ▁have ▁demonstrated ▁that ▁people ▁with ▁extreme ▁political ▁views ▁( both