You are always welcome to join once you learn more about Bordigism and decide if you are sympathetic to it/agree with it. For now I will decline your request.
I saw you wanted to join the Bordigist user group that was made. I am keeping that group restricted mainly to Bordigists or those sympathetic to Bordigism. If you just want to learn about Bordigism, I would suggest joining the Bordiga Literati group. Just let me know.