The link you followed will bring you to this page:

https://www.change.org/p/intellettuali-sostegno-alla-manifestazione-del-12-10-contro-le-servit%C3%B9-militari-in-sardegna?utm_content=cl_sharecopy_18049414_it-IT%3Av5&recruiter=45142775&recruited_by_id=79a09570-76ce-0130-d476-3c764e04873b&utm_source=share_petition&utm_medium=copylink&utm_campaign=psf_combo_share_initial&utm_term=psf_combo_share_initial&share_bandit_exp=initial-18049414-it-IT&share_bandit_var=v0