Hannah Arendt's Pursuit Of Evil

Hannah Arendt went out in search of answers to this question, can one do evil without actually being evil? While studying people who have committed evil crimes she found that some of them were “terrifyingly normal”. Hannah Arendt found that some of them never realized what they were doing and lacked cognitive ability and claimed he did his evil crimes to “fit in”. Some people thought that though someone claimed to lack consciousness or remorse they are still considered a monster compared to “normal people”.
I don’t personally believe every evildoer is an evil person. I do believe that if you repeatedly commit evil crimes you can be considered evil, its like if you repeatedly make the same mistake several times is it still a mistake at that