That sounds like you're playing the exact caricature of what they think 'the left' is so it's valuable to have you around as a sort of prototypical 'see, you do

That sounds like you're playing the exact caricature of what they think 'the left' is so it's valuable to have you around as a sort of prototypical 'see, you don't want to be like him'. In other words, you help them keep people away from 'the left' so there's no reason to ban you.