Well I'm sure part of it is that he's been unjustly branded as a pedophile. Also I doubt he cherishes the prospect of starting FSF Round 2.
I haven't seen him branded as a pedophile. I'll happily brand him as a former pedophile apologist, and have yet to read anything that suggests he has renounced those views explicitly.
I would argue the delta between calling someone a pedophile and a pedophile apologist is pretty negligible in the age of clickbaity news bites.
Who is branding him as this?
He's being branded as an insensitive twit who's pattern of behavior has showed no signs of attempts to change, understand or really engage with the criticism he chooses to attract, and has finally broken the camel's back and this is the result.
He hasn't been silenced. He still has internet access and the many publishing platforms that affords him.
He's been dissociated from a role in an organization.
If his ideas so clearly stand on their own, then he should have no problems. What he will not be doing anymore is acting as a direct representative of the organization.