1

Protecting something important to them

2

Belief that their actions are necessary for the greater good

3

Desire for knowledge

4

Being manipulated

5

Twisted by (mental or physical) pain

6

Delusion or paranoia

7

Fear, cowardice or desperation

8

Just following orders

9

Desire for survival or immortality

10

Desire for recognition, reputation, fame or infamy

11

Ambition or desire for power

12

Hatred of rules or authority

13

Religious fervour

14

Revenge

15

Envy

16

Greed or hedonism

17

Belief that might makes right

18

Belief in their own superiority

19

Hatred of outsiders or minorities

20

Cruelty or sadism