Calling it an "anti- Proton campaign" or "benign" is just rhetorical hand waving. Those words let you dismiss criticism without engaging with the substance. Proton did deliberately email people who opted out. That is a GDPR violation, full stop. They are a large, well resourced company; "oops" is not an excuse. Criticism over that is not hysteria or bandwagoning, and blaming people for speaking up instead of the company for breaking the rules is weak.