I asked my T, why did you tell me I was a contributing factor to ending the group?
She said she wanted to be honest with me.
But I still have to ask her, why did you tell me now?

OK. I was a contributing factor. But others contributed a great deal more.

No one can predict all the consequences their actions might have.

I thought I was playing within the rules. T either clarified the rules or changed the rules: I'll give her the benefit of the doubt on this one. I complied grudgingly and with some backsliding, but I did stop sending hate mail.

She did not at that point tell me that I was imperilling the group, so there was nothing I could have done about it.

I did my best. She did her best. Sometimes bad things happen that no one intends.

Finis.