Imo the real reason why it's surprising to find a defector is because leftist anarchist groups have methods for weeding out those who aren't truly one of them.

You have to be all-in for the cause in order to get anywhere in an anarchist group. If they sniff out any fear or hesitation to do whatever it takes, they know you're not one of them.

Source: A fbi file I read on wikileaks once, detailing the reasons why they find it difficult to infiltrate anarchist groups. I'm having trouble finding it again.

Imo the real reason why it's surprising to find a defector is because leftist anarchist groups have methods for weeding out those who aren't truly one of them.

You have to be all-in for the cause in order to get anywhere in an anarchist group. If they sniff out any fear or hesitation to do whatever it takes, they know you're not one of them.